Difference between revisions of "Browser plugins"

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[[Category:Web browser]]
 
[[de:Browser Plugins]]
 
[[de:Browser Plugins]]
[[es:Browser Plugins]]
+
[[es:Browser plugins]]
 
[[fr:Plugins navigateur]]
 
[[fr:Plugins navigateur]]
 +
[[ja:ブラウザプラグイン]]
 +
[[ru:Browser plugins]]
 
[[tr:Web tarayıcı eklentileri]]
 
[[tr:Web tarayıcı eklentileri]]
[[zh-CN:Browser Plugins]]
+
[[zh-hans:Browser plugins]]
[[Category:Web Browser]]
+
{{Related articles start}}
These plugins work in [[Firefox]], [[Opera]] and WebKit derivatives. <!-- Chrome? -->
+
{{Related|Opera}}
 +
{{Related|Firefox}}
 +
{{Related|Chromium}}
 +
{{Related articles end}}
  
== Flash Player ==
+
There are two types of browser plugins, based on the plugin API they
 +
use:
 +
*Netscape plugin API (NPAPI): these plugins work in most smaller browsers ([[Firefox#Plugins|Firefox supports only the Flash Player plugin]], Chromium and Opera do '''not''' support these plugins).
 +
*Pepper plugin API (PPAPI): these plugins work in [[Chromium]] (and Chrome), [[Opera]] and [[Vivaldi]].
  
=== Gnash ===
+
Most plugins on this page are NPAPI-only, unless noted otherwise.
[http://www.gnu.org/software/gnash/ GNU Gnash] is a free (libre) alternative to Adobe Flash Player. It is available both as a standalone player for desktop computers and embedded devices, as well as a browser plugin, and supports the SWF format up to version 7 (with versions 8 and 9 under development) and about 80% of ActionScript 2.0.
 
  
GNU Gnash can be [[Pacman|installed]] with the package {{Pkg|gnash-gtk}}, available in the [[official repositories]].
+
== Flash Player ==
  
=== Lightspark ===
+
=== Adobe Flash Player ===
[http://lightspark.github.com/ Lightspark] is another attempt to provide a free alternative to Adobe Flash aimed at supporting newer Flash formats. Although it is still very much in development, it supports some [https://github.com/lightspark/lightspark/wiki/Site-Support popular sites].
 
  
Lightspark can be [[Pacman|installed]] with the package {{AUR|lightspark}} or {{AUR|lightspark-git}}, available in the [[AUR]].
+
==== Installation ====
  
=== Adobe Flash Player ===
+
The package you will need to install depends on the browser you use.
The Adobe Flash Player is also available in the official repositories, although it was [http://blogs.adobe.com/flashplayer/2012/02/adobe-and-google-partnering-for-flash-player-on-linux.html discontinued on Linux] (for both 32-bit and 64-bit). Adobe will be providing security updates
 
for another 5 years (i.e. 2017), but new versions of the plugin will only come integrated with Google Chrome (using its new PPAPI).
 
  
[[Pacman|Install]] {{Pkg|flashplugin}} from the [[official repositories]].
+
* The NPAPI version can be [[install]]ed with the {{Pkg|flashplugin}} package.
 +
* The PPAPI version can be [[install]]ed with the {{Pkg|pepper-flash}} package.
  
 
{{Note|
 
{{Note|
* Some versions of Epiphany have trouble recognizing the Flash plugin. See [[Epiphany#Flash]] for more details.
+
* Some Flash apps may require the {{AUR|ttf-ms-fonts}} package in order to properly render text.
* The Adobe Flash Player may also require {{AUR|ttf-ms-fonts}} from the [[AUR]] in order to properly render text.
+
* The {{AUR|freshplayerplugin}} package provides an ''experimental'' adapter to use {{Pkg|pepper-flash}} with NPAPI based browsers like Firefox. It can be configured (e.g. for enabling HW-acceleration) by copying {{ic|/usr/share/freshplayerplugin/freshwrapper.conf.example}} to {{ic|~/.config/freshwrapper.conf}}.
 
}}
 
}}
{{Tip|Chromium can also use the Google Chrome Flash Player, see [[Chromium#Flash Player]].}}
+
 
 +
==== Upgrade ====
 +
 
 +
If you are using [[Firefox]], please make sure to follow [[Firefox#Firefox detects the wrong version of my plugin|this instruction first]].
  
 
==== Configuration ====
 
==== Configuration ====
<!-- Change this heading to Flash configuration once more than one plugin needs a similar section -->
 
To change the preferences (privacy settings, resource usage, etc.) of Flash Player, right click on any embedded Flash content and choose ''Settings'' from the menu, or go to the [http://www.macromedia.com/support/documentation/en/flashplayer/help/settings_manager.html Macromedia website]. There, a Flash animation will give you access to your local settings.
 
  
You can also use the Flash settings file {{ic|/etc/adobe/mms.cfg}}. An example configuration:
+
To change the preferences (privacy settings, resource usage, etc.) of Flash Player, right click on any embedded Flash content (for instance [https://helpx.adobe.com/flash-player.html adobe's flash home]) and choose ''Settings'' from the menu.
{{hc|/etc/adobe/mms.cfg|<nowiki>
+
 
  # Adobe player settings
+
You can also use the Flash settings file {{ic|/etc/adobe/mms.cfg}}. Gentoo has an extensively commented [http://sources.gentoo.org/cgi-bin/viewvc.cgi/gentoo-x86/www-plugins/adobe-flash/files/mms.cfg example mms.cfg].
  AVHardwareDisable = 0
+
 
  FullScreenDisable = 0
+
To enable video decoding with [[hardware video acceleration]], add/uncomment the following line:
  LocalFileReadDisable = 1
+
EnableLinuxHWVideoDecode = 1
  FileDownloadDisable = 1
+
It might also be required to add/uncomment the following line:
  FileUploadDisable = 1
+
OverrideGPUValidation = 1
  LocalStorageLimit = 1
+
 
  ThirdPartyStorage = 1
+
==== Multiple monitor full-screen fix ====
  AssetCacheSize = 10
+
 
  AutoUpdateDisable = 1
+
When using a multiple monitor setup, or swapping between virtual desktops, it is possible to lose focus on a fullscreen flash window. In such a case, the adobe flash-plugin will automatically exit full-screen mode. This may not be to your liking.
  LegacyDomainMatching = 0
+
 
  LocalFileLegacyAction = 0
+
Unfortunately, this behavior is hard coded into the binary. In order to change this behavior it is necessary to alter the binary.
  AllowUserLocalTrust = 0
+
 
  # DisableSockets = 1
+
Fixing this issue only works for the NPAPI plugin and this issue can be fixed via 2 ways.
  OverrideGPUValidation = 1
+
 
</nowiki>}}
+
* Using the {{AUR|flashplugin-focusfix}}.
 +
 
 +
* [http://www.webupd8.org/2012/10/ubuntu-multi-monitor-tweaks-full-screen.html Patching manually]:
 +
 
 +
:After the package has been installed, backup {{ic|libflashplayer.so}}:
 +
:{{bc|# cp /usr/lib/mozilla/plugins/libflashplayer.so /usr/lib/mozilla/plugins/libflashplayer.so.backup}}
 +
 
 +
:Then, you will need to alter that file using a hex editor like {{Pkg|ghex}}. You must open it with root privileges obviously.
 +
:{{bc|# ghex /usr/lib/mozilla/plugins/libflashplayer.so}}
 +
 
 +
:Using the hex editor find the string {{ic|_NET_ACTIVE_WINDOW}}. In ghex the readable string is on the right hand side of the window, and the hex is on the left, you are trying to locate the readable string. It should be easy to find using a search function.
 +
 
 +
:Upon finding {{ic|_NET_ACTIVE_WINDOW}} rewrite the line, but '''do not''' change the length of the line, for example {{ic|_NET_ACTIVE_WINDOW}} becomes {{ic|_XET_ACTIVE_WINDOW}}.
 +
 
 +
:Save the binary, and restart any processes using the plugin (as this will crash any instance of the plugin in use.)
 +
 
 +
==== Playing DRM-protected content ====
 +
 
 +
See [[Flash DRM content]].
 +
 
 +
=== Shumway ===
  
You can also refer to the [http://sources.gentoo.org/cgi-bin/viewvc.cgi/gentoo-x86/www-plugins/adobe-flash/files/mms.cfg mms.cfg from Gentoo], which is extensively commented.
+
[http://mozilla.github.io/shumway/ Shumway] is a [https://github.com/mozilla/shumway/issues/2420 discontinued] HTML5 technology experiment that explores building a faithful and efficient renderer for the SWF file format without native code assistance. The plugin may be installed directly from [http://mozilla.github.io/shumway/ Mozilla's github.io site].
  
==== Disable the "Press ESC to exit full screen mode" message ====
+
=== Gnash ===
For a way to disable this message see [http://ubuntuforums.org/showthread.php?t=1839293 this ubuntuforums.org post].
 
  
Backup {{ic|libflashplayer.so}}:
+
[[Wikipedia:Gnash (software)|Gnash]] is a free (libre) alternative to Adobe Flash Player. It is available both as a standalone player for desktop computers and embedded devices, as well as a browser plugin, and supports the SWF format up to version 7 (with versions 8 and 9 under development) and about 80% of ActionScript 2.0.
  # cp /usr/lib/mozilla/plugins/libflashplayer.so /usr/lib/mozilla/plugins/libflashplayer.so.backup
 
  
Make a copy of it in your home directory:
+
There is a packages available: {{AUR|gnash-git}}.
  # cp /usr/lib/mozilla/plugins/libflashplayer.so ~/
 
  
[[Pacman|Install]] {{Pkg|wine}} from the [[official repositories]].
+
=== Lightspark ===
  
Download {{ic|Flash Fullscreen Patcher.zip}} from [http://forum.videohelp.com/threads/304807-How-to-remove-annoying-Press-Esc-to-message-in-Flash-Video this page], extract and execute with {{ic|wine}}:
+
[http://lightspark.github.com/ Lightspark] is another attempt to provide a free alternative to Adobe Flash aimed at supporting newer Flash formats. Lightspark has the ability to fall back on Gnash for old content, which enables users to install both and enjoy wider coverage. Although it is still very much in development, it supports some [https://github.com/lightspark/lightspark/wiki/Site-Support popular sites].
  
  $ wget http://forum.videohelp.com/attachments/9255-1319291919/Flash%20Fullscreen%20Patcher.zip
+
Lightspark can be [[install]]ed with the {{AUR|lightspark-git}} package.
  $ unzip Flash\ Fullscreen\ Patcher.zip
 
  $ wine Flash\ Fullscreen\ Patcher.exe
 
  
Patch {{ic|libflashplayer.so}} (the one from your home directory) using the GUI.
+
== PDF viewer ==
Copy the patched Flash Player back to the plugins directory:
 
  # cp ~/libflashplayer.so /usr/lib/mozilla/plugins/
 
  
==PDF viewer==
+
=== PDF.js ===
 +
 
 +
[https://github.com/mozilla/pdf.js PDF.js] is a PDF renderer created by Mozilla and built using HTML5 technologies.
 +
 
 +
It is included in [[Firefox]].
 +
 
 +
For [[Chromium]] and Google Chrome it is available as extension in the [https://chrome.google.com/webstore/detail/pdf-viewer/oemmndcbldboiebfnladdacbdfmadadm Chrome Web Store].
  
 
=== External PDF viewers ===
 
=== External PDF viewers ===
To use an external PDF viewer you need [[#MozPlugger]] or [[#kpartsplugin]].
 
  
If you want to use MozPlugger with Evince, for example, you have to find the lines containing {{ic|pdf}} in the {{ic|/etc/mozpluggerrc}} file and modify the corresponding line after {{ic|GV()}} as below:  
+
To use an external PDF viewer you need [[#MozPlugger]].
 +
 
 +
If you want to use MozPlugger with Evince, for example, you have to find the lines containing {{ic|pdf}} in the {{ic|/etc/mozpluggerrc}} file and modify the corresponding line after {{ic|GV()}} as below:
 
  repeat noisy swallow(evince) fill: evince "$file"
 
  repeat noisy swallow(evince) fill: evince "$file"
 
(replace {{ic|evince}} with something else if it is not your viewer of choice).
 
(replace {{ic|evince}} with something else if it is not your viewer of choice).
  
=== Adobe Reader ===
+
If this is not enough, you may need to change 2 values in {{ic|about:config}}:
Due to licensing restrictions, Adobe Reader cannot be distributed from any of the official Arch Linux repositories. There are versions available in the [[AUR]]. Please note that no matter how many votes it receives, Adobe Reader will never be included in the [[official repositories]]. See this [https://aur.archlinux.org/packages.php?ID=16980 comment] for an explanation.
+
* Change {{ic|pdfjs.disabled}}'s value to ''true'';
 +
* Change {{ic|plugin.disable_full_page_plugin_for_types}}'s value to an empty value.
 +
 
 +
Restart and it should work like a charm!
 +
 
 +
== Online payment in China ==
 +
 
 +
Third-party online payment sites in China tend to use a "security plugin" for the password field.
 +
They are not supported anymore in Firefox 52+. You could try {{AUR|palemoon}} for NPAPI support.
 +
* {{AUR|upeditor}} for UnionPay Online Pay (银联在线支付).
 +
* {{AUR|aliedit}} for Alipay (支付宝).
 +
 
 +
== Citrix ==
 +
 
 +
See [[Citrix]].
 +
 
 +
== Java (IcedTea) ==
 +
 
 +
{{Note|Both Java plugins are NPAPI-only and thus do not work in Chromium, Opera and Firefox [https://support.mozilla.org/t5/Problems-with-add-ons-plugins-or/Why-do-Java-Silverlight-Adobe-Acrobat-and-other-plugins-no/ta-p/31069 52 and newer]. [[Firefox#Installing|Firefox ESR]] will continue supporting NPAPI plugins until early 2018.}}
  
Also, there are [https://aur.archlinux.org/packages.php?O=0&K=acroread-&do_Search=Go localizations] available in many languages.
+
To enable [[Java]] support in your browser, you have two options: the open-source [[Wikipedia:OpenJDK|OpenJDK]] (recommended) or Oracle's proprietary version. For details about why OpenJDK is recommended see [https://mailman.archlinux.org/pipermail/arch-general/2011-August/021671.html].
  
==== 32-bit ====
+
To use OpenJDK, you have to install the [http://icedtea.classpath.org/wiki/Main_Page IcedTea] browser plugin, {{Pkg|icedtea-web}}.
Adobe Acrobat Reader is only available as a 32-bit binary. It can be installed with the {{AUR|acroread}} package, available in the [[AUR]].
 
  
This package installs the Acrobat Reader application as well as the Firefox plugin. Note that hardware-assisted rendering is unavailable under Linux (at least using a Geforce 8600GTS with driver version 185.18.14).
+
If you want to use Oracle's JRE, install the {{AUR|jre}} package.
  
==== 64-bit ====
+
{{Note|If you experience any problems with the Java plugin (e.g. it is not recognized by the browser), you can try this [[#Plugins_are_installed_but_not_working|solution]].}}
There is yet to be an official 64-bit version of Adobe Reader.
 
  
To use it in a 64-bit environment, you can:
+
== Pipelight ==
* Follow [[Install bundled 32-bit system in Arch64|this guide]] originally posted in the forums. It involves creating a chrooted environment that could be reused for other 32-bit only applications.
 
  
* Install {{AUR|bin32-acroread}} (with all its 32-bit dependencies) from [[AUR]]. Be advised that the [[Firefox]] plugin cannot be used ''directly'' with this binary -- it will not load in the 64-bit browser. To load it install the {{Pkg|nspluginwrapper}} plackage from the official [[Multilib|[multilib]]] repository and run:
+
See [[Pipelight]].
$ nspluginwrapper -v -a -i
 
as a normal user. This checks the plugin directory and links the plugins as needed.
 
  
== Citrix ==
+
== Multimedia playback ==
{{Box||See the main article: [[Citrix]]|#E5E5FF|#FCFCFC}}
+
 
 +
Many browsers support the [[GStreamer]] framework to play multimedia inside HTML5 {{ic|<audio>}} and {{ic|<video>}} elements. Check the optional dependencies of the browser package (or of the web engine, e.g. {{Pkg|webkit2gtk}} or {{Pkg|qt5-webkit}}) to see if GStreamer is supported. See [[GStreamer#Installation]] for the description of each plugin.
 +
 
 +
=== Other plugins ===
 +
 
 +
* {{App|Gecko Media Player|Mozilla browser plugin to handle media on websites, using MPlayer.|https://sites.google.com/site/kdekorte2/gecko-mediaplayer|{{Pkg|gecko-mediaplayer}}{{Broken package link|package not found}}}}
 +
* {{App|Rosa Media Player Plugin|Qt-based browser plugin also based on MPlayer.|https://abf.rosalinux.ru/uxteam/ROSA_Media_Player|{{AUR|rosa-media-player-plugin}}}}
 +
* {{App|VLC Plugin|NPAPI-based plugin that uses VLC technologies.|https://code.videolan.org/videolan/npapi-vlc|{{Pkg|npapi-vlc}}}}
  
== Java (IcedTea) ==
+
=== Open-with Firefox extension ===
To enable [[Java]] support in your browser, you have two options: use either Oracle's non-free JRE or the [[Wikipedia:Openjdk|OpenJDK]] environment (recommended). For details about why OpenJDK is recommended see [http://mailman.archlinux.org/pipermail/arch-general/2011-August/021671.html this].
 
  
To use OpenJDK, you have to install the [http://icedtea.classpath.org/wiki/Main_Page IcedTea] browser plugin:
+
# Install [https://addons.mozilla.org/firefox/addon/open-with/ Open-with] add-on.
* {{Pkg|icedtea-web}} for version 6 of the Java environment.
+
# Open {{ic|about:openwith}}, select ''Add...''
* {{Pkg|icedtea-web-java7}} for version 7 of the Java environment.
+
# In the dialog select a video streaming capable player (e.g. [[mpv|/usr/bin/mpv]]).
 +
# (Optional step) Add needed arguments to the player (e.g. you may want {{ic|--force-window --ytdl}} for ''mpv'')
 +
# (Optional step) Choose how to display the dialogs using the left panel.
 +
# Right click on links or visit pages containing videos. If the site is supported, the player will open as expected.
  
If you want to use Oracle's JRE you have to install the {{AUR|jre}} or {{AUR|jre6}} package, available in the [[AUR]].
+
The same procedure can be used to associate video downloaders such as ''youtube-dl''.
  
See [[Java#OpenJDK JVM]] for additional details and references.
+
=== youtube-dl ===
  
{{Note|If you experience any problems with the Java plugin (it is not recognized by the browser), you can try this [[Flash#Plugins_are_installed_but_not_working|solution]].}}
+
{{Merge|#Other plugins|Does not deserve separate section.}}
  
== Video Plugins ==
+
Install [https://addons.mozilla.org/en-US/firefox/addon/watch-with-mpv/ Watch with MPV] for playback of [http://rg3.github.io/youtube-dl/supportedsites.html supported sites] with an external player of your choice ([[mpv]] by default). Add {{ic|1=--player-operation-mode=pseudo-gui}} to ''Additional player parameters'' for websites with audio only streams.
  
* {{App|Gecko Media Player|A Mozilla browser plugin to handle media on websites, using MPlayer.|https://sites.google.com/site/kdekorte2/gecko-mediaplayer|{{Pkg|gecko-mediaplayer}}}}
+
== Google Hangouts ==
* {{App|Totem Plugin|A browser plugin based on the [[Wikipedia:Totem (software)|Totem]] media player for [[Gnome]] which uses [[Gstreamer]].|http://projects.gnome.org/totem/|{{Pkg|totem-plugin}}}}
+
{{Note|
* {{App|Rosa Media Player Plugin|A Qt-based browser plugin also based on MPlayer.|https://abf.rosalinux.ru/uxteam/ROSA_Media_Player|{{AUR|rosa-media-player-plugin}}}}
+
* This plugin is not required when using Chromium
* {{App|VLC Plugin|A NPAPI-based plugin that uses VLC technologies.|http://git.videolan.org/?p&#61;npapi-vlc.git;a&#61;summary|{{AUR|npapi-vlc-git}}}}
+
* Hangouts calling doesn't work in Firefox as of March 2017.[https://gsuiteupdates.googleblog.com/2017/02/google-hangouts-temporary-issues-with-firefox.html]
 +
}}
 +
Hangouts plugin can be installed with the {{AUR|google-talkplugin}} package.
 +
Hangouts is a messenger by Google, that allows you to make video call between 15 people simultaneously, or share your screen with others.
  
== Other ==
+
== MozPlugger ==
  
=== MozPlugger ===
+
MozPlugger can be installed with the {{AUR|mozplugger}} package.
MozPlugger can be installed with the {{AUR|mozplugger}} package, respectively {{AUR|mozplugger-chromium}}, available in the [[AUR]].
 
  
 
[http://mozplugger.mozdev.org/ MozPlugger] is a Mozilla plugin which can show many types of multimedia inside your browser. To accomplish this, it uses external programs such as MPlayer, xine, Evince, OpenOffice, TiMidity, etc. To modify or add applications to be used by MozPlugger just modify the {{ic|/etc/mozpluggerrc}} file.
 
[http://mozplugger.mozdev.org/ MozPlugger] is a Mozilla plugin which can show many types of multimedia inside your browser. To accomplish this, it uses external programs such as MPlayer, xine, Evince, OpenOffice, TiMidity, etc. To modify or add applications to be used by MozPlugger just modify the {{ic|/etc/mozpluggerrc}} file.
Line 148: Line 199:
 
{{hc|/etc/mozpluggerrc|
 
{{hc|/etc/mozpluggerrc|
 
...
 
...
### OpenOffice
+
### LibreOffice/OpenOffice
 
define([OO],[swallow(VCLSalFrame) fill: libreoffice --nologo --norestore --view $1 "$file"
 
define([OO],[swallow(VCLSalFrame) fill: libreoffice --nologo --norestore --view $1 "$file"
 
     swallow(VCLSalFrame) fill: ooffice2.0 -nologo -norestore -view $1 "$file"
 
     swallow(VCLSalFrame) fill: ooffice2.0 -nologo -norestore -view $1 "$file"
Line 162: Line 213:
 
text/x-c++:hpp:C++ Header File
 
text/x-c++:hpp:C++ Header File
 
     repeat noisy swallow(kate) fill: kate -b "$file"
 
     repeat noisy swallow(kate) fill: kate -b "$file"
 +
}}
 +
 +
To change the default of MPlayer so that [[mpv]] is used instead, change the appropriate lines such that:
 +
{{hc|1=/etc/mozpluggerrc|2=
 +
...
 +
### MPlayer
 +
 +
#define(MP_CMD,[mplayer -really-quiet -nojoystick -nofs -zoom -vo xv,x11 -ao esd,alsa,oss,arts,null -osdlevel 0 $1 </dev/null])
 +
define(MP_CMD,[mpv -really-quiet $1 </dev/null])
 +
 +
#define(MP_EMBED,[embed noisy ignore_errors: MP_CMD(-xy $width -wid $window $1)])
 +
define(MP_EMBED,[embed noisy ignore_errors: MP_CMD(--autofit=$width -wid $window $1)])
 +
 +
#define(MP_NOEMBED,[noembed noisy ignore_errors maxaspect swallow(MPlayer): MP_CMD($1)])
 +
define(MP_NOEMBED,[noembed noisy ignore_errors maxaspect swallow(mpv): MP_CMD($1)])
 +
 +
...
 +
 +
#define(MP_AUDIO,[mplayer -quiet -nojoystick $1 </dev/null])
 +
define(MP_AUDIO,[mpv -really-quiet $1 </dev/null])
 +
 +
#define(MP_AUDIO_STREAM,[controls stream noisy ignore_errors: mplayer -quiet -nojoystick $1 "$file" </dev/null])
 +
define(MP_AUDIO_STREAM,[controls stream noisy ignore_errors: mpv -really-quiet $1 "$file" </dev/null])
 +
...
 
}}
 
}}
  
 
For a more complete list of MozPlugger options see [http://www.linuxmanpages.com/man7/mozplugger.7.php this page].
 
For a more complete list of MozPlugger options see [http://www.linuxmanpages.com/man7/mozplugger.7.php this page].
  
=== kpartsplugin ===
+
== Troubleshooting ==
[http://www.unix-ag.uni-kl.de/~fischer/kpartsplugin/ The KParts plugin] is a plugin that uses KDE's KPart technology to embed different file viewers in the browser, such as Okular (for PDF), Ark (for different archives), Calligra Words (for ODF), etc. It cannot use applications that are not based on the KPart technology.
 
  
The KParts plugin can be installed with the package {{Pkg|kpartsplugin}}, available in the official repositories.
+
=== Flash Player: no sound ===
  
==Troubleshooting==
+
Flash Player outputs its sound only through the default [[ALSA]] device, which is number '''0'''. If you have multiple sound devices (a very common example is having a sound card and HDMI output in the video card), then your preferred device may have a different number.
 
 
=== Flash Player: No sound ===
 
Flash Player outputs its sound only through the default [[Advanced Linux Sound Architecture|ALSA]] device, which is number '''0'''. If you have multiple sound devices (a very common example is having a sound card and HDMI output in the video card), then your preferred device may have a different number.
 
  
 
For a list of available devices with their respective numbers, run:
 
For a list of available devices with their respective numbers, run:
$ aplay -l
+
{{hc|$ aplay -l|
 
  **** List of PLAYBACK Hardware Devices ****
 
  **** List of PLAYBACK Hardware Devices ****
 
  card 0: Generic [HD-Audio Generic], device 3: HDMI 0 [HDMI 0]
 
  card 0: Generic [HD-Audio Generic], device 3: HDMI 0 [HDMI 0]
Line 188: Line 259:
 
   Subdevices: 1/1
 
   Subdevices: 1/1
 
   Subdevice #0: subdevice #0
 
   Subdevice #0: subdevice #0
 
+
}}
 
In this case, the HDMI output is {{ic|card 0}} and the sound card is {{ic|card 1}}. To make your sound card the default for ALSA, create the file {{ic|.asoundrc}} in your home directory, with the following content:
 
In this case, the HDMI output is {{ic|card 0}} and the sound card is {{ic|card 1}}. To make your sound card the default for ALSA, create the file {{ic|.asoundrc}} in your home directory, with the following content:
 
{{hc|~/.asoundrc|
 
{{hc|~/.asoundrc|
Line 202: Line 273:
 
}}
 
}}
  
=== Flash Player: Blocking sound for other applications or delayed playback ===
+
=== Flash Player: blocking sound for other applications or delayed playback ===
 +
 
 
If sound is delayed within Flash videos or Flash stops sound from any other application, then make sure you do not have {{ic|snd_pcm_oss}} module loaded:
 
If sound is delayed within Flash videos or Flash stops sound from any other application, then make sure you do not have {{ic|snd_pcm_oss}} module loaded:
 
  $ lsmod | grep snd_pcm_oss
 
  $ lsmod | grep snd_pcm_oss
Line 209: Line 281:
 
and restart the browser to see if it helps.
 
and restart the browser to see if it helps.
  
=== Flash Player: Bad (choppy) sound on the 64-bit version ===
+
=== Flash Player: performance ===
There is a problem with Flash plugin 11 on 64-bit systems and a new {{ic|memcpy}} routine in {{Pkg|glibc}} (for more details see [https://bugzilla.redhat.com/show_bug.cgi?id&#;638477 this Fefora bug report]), which makes the sound choppy on MP3 streams. Current workarounds are:
+
 
* replacing the {{ic|memcpy}} routine as suggested in [http://forums.fedoraforum.org/showthread.php?t=258346 this thread].
+
Adobe's Flash plugin has some serious performance issues, especially when CPU frequency scaling is used. There seems to be a policy not to use the whole CPU workload, so the frequency scaling governor does not clock the CPU any higher. To work around this issue, see [[CPU frequency scaling#Switching threshold]]
* installing {{AUR|flashplugin-square}} from the [[AUR]] (this is a version of the Flash plugin with working hardware acceleration).
 
  
=== Flash Player: Performance ===
+
=== Flash Player: no webcam, or low webcam resolution ===
Adobe's Flash plugin has some serious performance issues, especially when CPU frequency scaling is used. There seems to be a policy not to use the whole CPU workload, so the frequency scaling governor does not clock the CPU any higher. To work around this issue, see [[cpufrequtils#Changing the ondemand governor's threshold]]
 
  
=== Flash Player: Low webcam resolution ===
+
If Flash doesn't detect your webcam at all, or it has low resolution (the image looks very pixelated), you can try starting your browser with this:
If your webcam has low resolution in Flash (the image looks very pixelated) you can try starting your browser with this:
+
 
  $ LD_PRELOAD=/usr/lib/libv4l/v4l1compat.so [broswer]
+
  $ LD_PRELOAD=/usr/lib/libv4l/v4l1compat.so <browser>
 +
 
 +
This is because Flash still uses the V4L1 camera API, long deprecated, and via the above we give it a compatibility layer which it needs.
 +
 
 +
=== Flash Player: black bars in full screen playback on multi-headed setups ===
  
=== Flash Player: Black bars in full screen playback on multi-headed setups ===
 
 
The Flash plugin has a known bug where the full screen mode does not really work when you have a multi-monitor setup. Apparently, it incorrectly determines the full screen resolution, so the full screen Flash Player fills the correct monitor but gets scaled as if the monitor had the resolution of the total display area.
 
The Flash plugin has a known bug where the full screen mode does not really work when you have a multi-monitor setup. Apparently, it incorrectly determines the full screen resolution, so the full screen Flash Player fills the correct monitor but gets scaled as if the monitor had the resolution of the total display area.
  
 
To fix this, you can use the "hack" described [http://al.robotfuzz.com/content/workaround-fullscreen-flash-linux-multiheaded-desktops here]. Simply download the source from the link given on the page, and follow the instructions in the README.
 
To fix this, you can use the "hack" described [http://al.robotfuzz.com/content/workaround-fullscreen-flash-linux-multiheaded-desktops here]. Simply download the source from the link given on the page, and follow the instructions in the README.
  
{{Tip|The hack is available in the [[AUR]] and can be installed with the {{AUR|fullscreenhack}} package.}}
+
{{Note|While the author mentions using NVDIA's TwinView, the hack should work for any multi-monitor setup.}}
  
{{Note|While the author mentions using Nvidia's TwinView, the hack should work for any multi-monitor setup.}}
+
=== Flash Player: videos not working on older systems ===
  
=== Flash Player: Blue tint on videos with Nvidia ===
+
If you have Adobe Flash installed on an older system and you start playing a video which simply turns black with nothing happening, it is most likely that your CPU does not support SSE2. You can simply check this by looking at your CPU flags with this command:
 +
$ grep sse2 /proc/cpuinfo
  
An issue with {{Pkg|flashplugin}} versions 11.2.202.228-1 and 11.2.202.233-1 causes it to send the U/V panes in the incorrect order resulting in a blue tint on certain videos. Version 0.5 of {{Pkg|libvdpau}} includes a workaround to fix this, see the [http://lists.x.org/archives/xorg-announce/2012-September/002066.html official announcement].
+
{{Expansion|sandfox is unmaintained and only uses rudimentary sandboxing; use a modern alternative like [https://github.com/thestinger/playpen playpen] instead. Or even better, circument the issue with external players like [[mpv]]}}
  
=== Flash Player: Leaking overlay with Nvidia ===
+
If no results are returned, then you need to install an older version of Flash (for example 10.3, or 11.1). Older versions possibly will have vulnerabilities. You should then consider sandboxing Firefox using the {{AUR|sandfox}} package See the [https://igurublog.wordpress.com/downloads/script-sandfox/ sandfox homepage] for usage information.
  
This bug is due to the incorrect color key being used by the {{Pkg|flashplugin}} version 11.2.202.228-1 (see [http://www.nvnews.net/vbulletin/showpost.php?p=2514210&postcount=102 this post] on the Nvidia forums) and causes the Flash content to "leak" into other pages or solid black backgrounds. To avoid this issue simply export {{ic|1=VDPAU_NVIDIA_NO_OVERLAY=1}} within either your shell profile (e.g. {{ic|~/.bash_profile}} or {{ic|~/.zprofile}}) or {{ic|~/.xinitrc}}
+
Older versions of Flash are available here:
 +
https://www.adobe.com/products/flashplayer/distribution3.html
 +
You need to copy {{ic|libflashplayer.so}} to the folder {{ic|/usr/lib/mozilla/plugins/}}
  
=== Flash Player: Videos not working on older systems ===
+
The most recent package without SSE2 is {{ic|flashplugin-11.1.102.63-1-i686.pkg.tar.xz}}. If you use the packaged version, you have to add {{ic|IgnorePkg &#61; flashplugin}} to {{ic|/etc/pacman.conf}}.
If you have Adobe Flash installed on an older system and you start playing a video which simply turns black with nothing happening, it is most likely that your CPU does not support SSE2. You can simply check this by looking at your CPU flags with this command:
+
 
# cat /proc/cpuinfo | grep sse2
+
=== Flash Player: plugin version still shown older version after upgrade ===
 +
 
 +
==== Firefox ====
  
If no results are returned, then you need to install an older version of Flash (for example 10.3). Older versions possibly will have vulnerabilities. You should then consider sandboxing Firefox using {{AUR|sandfox}}, available in the [[AUR]]. See the [https://igurublog.wordpress.com/downloads/script-sandfox/ sandfox homepage] for usage information.
+
Solution for Firefox: delete file "pluginreg.dat" in user's profile directory.
  
Older versions of Flash are available here:
+
* Close firefox
http://www.adobe.com/products/flashplayer/distribution3.html
+
* Go to {{ic|/home/''<username>''/.mozilla/firefox/''<profile_folder>''/}}
 +
* Delete file "pluginreg.dat"
  
You need to copy {{ic|libflashplayer.so}} to the folder {{ic|/usr/lib/mozilla/plugins/}}
+
Firefox will automatically rebuild this file once it is started again. Make sure to substitute ''<username>'' and ''<profile_folder>'' with the appropriate information.
  
 
=== Plugins are installed but not working ===
 
=== Plugins are installed but not working ===
 +
 
A common problem is that the plugin path is unset. This typically occurs on a new install, when the user has not re-logged in before running Firefox after the installation. Test if the path is unset:
 
A common problem is that the plugin path is unset. This typically occurs on a new install, when the user has not re-logged in before running Firefox after the installation. Test if the path is unset:
  echo $MOZ_PLUGIN_PATH
+
  $ printenv MOZ_PLUGIN_PATH
 
If unset, then either re-login, or source {{ic|/etc/profile.d/mozilla-common.sh}} and start Firefox from the same shell:
 
If unset, then either re-login, or source {{ic|/etc/profile.d/mozilla-common.sh}} and start Firefox from the same shell:
  . /etc/profile.d/mozilla-common.sh && firefox
+
  $ source /etc/profile.d/mozilla-common.sh && firefox
  
 
=== Gecko Media Player will not play Apple trailers ===
 
=== Gecko Media Player will not play Apple trailers ===
 +
 
If Apple Trailers appear to start to play and then fail, try setting the user agent for your browser to:
 
If Apple Trailers appear to start to play and then fail, try setting the user agent for your browser to:
 
  QuickTime/7.6.2 (qtver=7.6.2;os=Windows NT 5.1Service Pack 3)
 
  QuickTime/7.6.2 (qtver=7.6.2;os=Windows NT 5.1Service Pack 3)

Latest revision as of 00:41, 11 August 2017

Related articles

There are two types of browser plugins, based on the plugin API they use:

Most plugins on this page are NPAPI-only, unless noted otherwise.

Flash Player

Adobe Flash Player

Installation

The package you will need to install depends on the browser you use.

Note:
  • Some Flash apps may require the ttf-ms-fontsAUR package in order to properly render text.
  • The freshplayerpluginAUR package provides an experimental adapter to use pepper-flash with NPAPI based browsers like Firefox. It can be configured (e.g. for enabling HW-acceleration) by copying /usr/share/freshplayerplugin/freshwrapper.conf.example to ~/.config/freshwrapper.conf.

Upgrade

If you are using Firefox, please make sure to follow this instruction first.

Configuration

To change the preferences (privacy settings, resource usage, etc.) of Flash Player, right click on any embedded Flash content (for instance adobe's flash home) and choose Settings from the menu.

You can also use the Flash settings file /etc/adobe/mms.cfg. Gentoo has an extensively commented example mms.cfg.

To enable video decoding with hardware video acceleration, add/uncomment the following line:

EnableLinuxHWVideoDecode = 1

It might also be required to add/uncomment the following line:

OverrideGPUValidation = 1

Multiple monitor full-screen fix

When using a multiple monitor setup, or swapping between virtual desktops, it is possible to lose focus on a fullscreen flash window. In such a case, the adobe flash-plugin will automatically exit full-screen mode. This may not be to your liking.

Unfortunately, this behavior is hard coded into the binary. In order to change this behavior it is necessary to alter the binary.

Fixing this issue only works for the NPAPI plugin and this issue can be fixed via 2 ways.

After the package has been installed, backup libflashplayer.so:
# cp /usr/lib/mozilla/plugins/libflashplayer.so /usr/lib/mozilla/plugins/libflashplayer.so.backup
Then, you will need to alter that file using a hex editor like ghex. You must open it with root privileges obviously.
# ghex /usr/lib/mozilla/plugins/libflashplayer.so
Using the hex editor find the string _NET_ACTIVE_WINDOW. In ghex the readable string is on the right hand side of the window, and the hex is on the left, you are trying to locate the readable string. It should be easy to find using a search function.
Upon finding _NET_ACTIVE_WINDOW rewrite the line, but do not change the length of the line, for example _NET_ACTIVE_WINDOW becomes _XET_ACTIVE_WINDOW.
Save the binary, and restart any processes using the plugin (as this will crash any instance of the plugin in use.)

Playing DRM-protected content

See Flash DRM content.

Shumway

Shumway is a discontinued HTML5 technology experiment that explores building a faithful and efficient renderer for the SWF file format without native code assistance. The plugin may be installed directly from Mozilla's github.io site.

Gnash

Gnash is a free (libre) alternative to Adobe Flash Player. It is available both as a standalone player for desktop computers and embedded devices, as well as a browser plugin, and supports the SWF format up to version 7 (with versions 8 and 9 under development) and about 80% of ActionScript 2.0.

There is a packages available: gnash-gitAUR.

Lightspark

Lightspark is another attempt to provide a free alternative to Adobe Flash aimed at supporting newer Flash formats. Lightspark has the ability to fall back on Gnash for old content, which enables users to install both and enjoy wider coverage. Although it is still very much in development, it supports some popular sites.

Lightspark can be installed with the lightspark-gitAUR package.

PDF viewer

PDF.js

PDF.js is a PDF renderer created by Mozilla and built using HTML5 technologies.

It is included in Firefox.

For Chromium and Google Chrome it is available as extension in the Chrome Web Store.

External PDF viewers

To use an external PDF viewer you need #MozPlugger.

If you want to use MozPlugger with Evince, for example, you have to find the lines containing pdf in the /etc/mozpluggerrc file and modify the corresponding line after GV() as below:

repeat noisy swallow(evince) fill: evince "$file"

(replace evince with something else if it is not your viewer of choice).

If this is not enough, you may need to change 2 values in about:config:

  • Change pdfjs.disabled's value to true;
  • Change plugin.disable_full_page_plugin_for_types's value to an empty value.

Restart and it should work like a charm!

Online payment in China

Third-party online payment sites in China tend to use a "security plugin" for the password field. They are not supported anymore in Firefox 52+. You could try palemoonAUR for NPAPI support.

  • upeditorAUR for UnionPay Online Pay (银联在线支付).
  • alieditAUR for Alipay (支付宝).

Citrix

See Citrix.

Java (IcedTea)

Note: Both Java plugins are NPAPI-only and thus do not work in Chromium, Opera and Firefox 52 and newer. Firefox ESR will continue supporting NPAPI plugins until early 2018.

To enable Java support in your browser, you have two options: the open-source OpenJDK (recommended) or Oracle's proprietary version. For details about why OpenJDK is recommended see [1].

To use OpenJDK, you have to install the IcedTea browser plugin, icedtea-web.

If you want to use Oracle's JRE, install the jreAUR package.

Note: If you experience any problems with the Java plugin (e.g. it is not recognized by the browser), you can try this solution.

Pipelight

See Pipelight.

Multimedia playback

Many browsers support the GStreamer framework to play multimedia inside HTML5 <audio> and <video> elements. Check the optional dependencies of the browser package (or of the web engine, e.g. webkit2gtk or qt5-webkit) to see if GStreamer is supported. See GStreamer#Installation for the description of each plugin.

Other plugins

  • Gecko Media Player — Mozilla browser plugin to handle media on websites, using MPlayer.
https://sites.google.com/site/kdekorte2/gecko-mediaplayer || gecko-mediaplayer[broken link: package not found]
  • Rosa Media Player Plugin — Qt-based browser plugin also based on MPlayer.
https://abf.rosalinux.ru/uxteam/ROSA_Media_Player || rosa-media-player-pluginAUR
  • VLC Plugin — NPAPI-based plugin that uses VLC technologies.
https://code.videolan.org/videolan/npapi-vlc || npapi-vlc

Open-with Firefox extension

  1. Install Open-with add-on.
  2. Open about:openwith, select Add...
  3. In the dialog select a video streaming capable player (e.g. /usr/bin/mpv).
  4. (Optional step) Add needed arguments to the player (e.g. you may want --force-window --ytdl for mpv)
  5. (Optional step) Choose how to display the dialogs using the left panel.
  6. Right click on links or visit pages containing videos. If the site is supported, the player will open as expected.

The same procedure can be used to associate video downloaders such as youtube-dl.

youtube-dl

Merge-arrows-2.pngThis article or section is a candidate for merging with #Other plugins.Merge-arrows-2.png

Notes: Does not deserve separate section. (Discuss in Talk:Browser plugins#)

Install Watch with MPV for playback of supported sites with an external player of your choice (mpv by default). Add --player-operation-mode=pseudo-gui to Additional player parameters for websites with audio only streams.

Google Hangouts

Note:
  • This plugin is not required when using Chromium
  • Hangouts calling doesn't work in Firefox as of March 2017.[2]

Hangouts plugin can be installed with the google-talkpluginAUR package. Hangouts is a messenger by Google, that allows you to make video call between 15 people simultaneously, or share your screen with others.

MozPlugger

MozPlugger can be installed with the mozpluggerAUR package.

MozPlugger is a Mozilla plugin which can show many types of multimedia inside your browser. To accomplish this, it uses external programs such as MPlayer, xine, Evince, OpenOffice, TiMidity, etc. To modify or add applications to be used by MozPlugger just modify the /etc/mozpluggerrc file.

For example, MozPlugger uses OpenOffice by default to open doc files. To change it to use LibreOffice instead, look for the OpenOffice section:

/etc/mozpluggerrc
...
### OpenOffice
define([OO],[swallow(VCLSalFrame) fill: ooffice2.0 -nologo -norestore -view $1 "$file"
    swallow(VCLSalFrame) fill: ooffice -nologo -norestore -view $1 "$file"
    swallow(VCLSalFrame) fill: soffice -nologo $1 "$file"])
...

and add LibreOffice at the beginning of the list:

/etc/mozpluggerrc
...
### LibreOffice/OpenOffice
define([OO],[swallow(VCLSalFrame) fill: libreoffice --nologo --norestore --view $1 "$file"
    swallow(VCLSalFrame) fill: ooffice2.0 -nologo -norestore -view $1 "$file"
    swallow(VCLSalFrame) fill: ooffice -nologo -norestore -view $1 "$file"
    swallow(VCLSalFrame) fill: soffice -nologo $1 "$file"])
...
Note: Be sure to also choose LibreOffice as your preferred application to open doc files.

As another simple example, if you want to open cpp files with your favorite text editor (we will use Kate) to get syntax highlighting, just add a new section to your mozpluggerrc file:

/etc/mozpluggerrc
text/x-c++:cpp:C++ Source File
text/x-c++:hpp:C++ Header File
    repeat noisy swallow(kate) fill: kate -b "$file"

To change the default of MPlayer so that mpv is used instead, change the appropriate lines such that:

/etc/mozpluggerrc
...
### MPlayer

#define(MP_CMD,[mplayer -really-quiet -nojoystick -nofs -zoom -vo xv,x11 -ao esd,alsa,oss,arts,null -osdlevel 0 $1 </dev/null])
define(MP_CMD,[mpv -really-quiet $1 </dev/null])

#define(MP_EMBED,[embed noisy ignore_errors: MP_CMD(-xy $width -wid $window $1)])
define(MP_EMBED,[embed noisy ignore_errors: MP_CMD(--autofit=$width -wid $window $1)])

#define(MP_NOEMBED,[noembed noisy ignore_errors maxaspect swallow(MPlayer): MP_CMD($1)])
define(MP_NOEMBED,[noembed noisy ignore_errors maxaspect swallow(mpv): MP_CMD($1)])

...

#define(MP_AUDIO,[mplayer -quiet -nojoystick $1 </dev/null])
define(MP_AUDIO,[mpv -really-quiet $1 </dev/null])

#define(MP_AUDIO_STREAM,[controls stream noisy ignore_errors: mplayer -quiet -nojoystick $1 "$file" </dev/null])
define(MP_AUDIO_STREAM,[controls stream noisy ignore_errors: mpv -really-quiet $1 "$file" </dev/null])
...

For a more complete list of MozPlugger options see this page.

Troubleshooting

Flash Player: no sound

Flash Player outputs its sound only through the default ALSA device, which is number 0. If you have multiple sound devices (a very common example is having a sound card and HDMI output in the video card), then your preferred device may have a different number.

For a list of available devices with their respective numbers, run:

$ aplay -l
 **** List of PLAYBACK Hardware Devices ****
 card 0: Generic [HD-Audio Generic], device 3: HDMI 0 [HDMI 0]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
 card 1: DX [Xonar DX], device 0: Multichannel [Multichannel]
   Subdevices: 0/1
   Subdevice #0: subdevice #0
 card 1: DX [Xonar DX], device 1: Digital [Digital]
   Subdevices: 1/1
   Subdevice #0: subdevice #0

In this case, the HDMI output is card 0 and the sound card is card 1. To make your sound card the default for ALSA, create the file .asoundrc in your home directory, with the following content:

~/.asoundrc
pcm.!default {
    type hw
    card 1
}
 
ctl.!default {
    type hw
    card 1
}

Flash Player: blocking sound for other applications or delayed playback

If sound is delayed within Flash videos or Flash stops sound from any other application, then make sure you do not have snd_pcm_oss module loaded:

$ lsmod | grep snd_pcm_oss

You can unload it:

# rmmod snd_pcm_oss

and restart the browser to see if it helps.

Flash Player: performance

Adobe's Flash plugin has some serious performance issues, especially when CPU frequency scaling is used. There seems to be a policy not to use the whole CPU workload, so the frequency scaling governor does not clock the CPU any higher. To work around this issue, see CPU frequency scaling#Switching threshold

Flash Player: no webcam, or low webcam resolution

If Flash doesn't detect your webcam at all, or it has low resolution (the image looks very pixelated), you can try starting your browser with this:

$ LD_PRELOAD=/usr/lib/libv4l/v4l1compat.so <browser>

This is because Flash still uses the V4L1 camera API, long deprecated, and via the above we give it a compatibility layer which it needs.

Flash Player: black bars in full screen playback on multi-headed setups

The Flash plugin has a known bug where the full screen mode does not really work when you have a multi-monitor setup. Apparently, it incorrectly determines the full screen resolution, so the full screen Flash Player fills the correct monitor but gets scaled as if the monitor had the resolution of the total display area.

To fix this, you can use the "hack" described here. Simply download the source from the link given on the page, and follow the instructions in the README.

Note: While the author mentions using NVDIA's TwinView, the hack should work for any multi-monitor setup.

Flash Player: videos not working on older systems

If you have Adobe Flash installed on an older system and you start playing a video which simply turns black with nothing happening, it is most likely that your CPU does not support SSE2. You can simply check this by looking at your CPU flags with this command:

$ grep sse2 /proc/cpuinfo

Tango-view-fullscreen.pngThis article or section needs expansion.Tango-view-fullscreen.png

Reason: sandfox is unmaintained and only uses rudimentary sandboxing; use a modern alternative like playpen instead. Or even better, circument the issue with external players like mpv (Discuss in Talk:Browser plugins#)

If no results are returned, then you need to install an older version of Flash (for example 10.3, or 11.1). Older versions possibly will have vulnerabilities. You should then consider sandboxing Firefox using the sandfoxAUR package See the sandfox homepage for usage information.

Older versions of Flash are available here: https://www.adobe.com/products/flashplayer/distribution3.html You need to copy libflashplayer.so to the folder /usr/lib/mozilla/plugins/

The most recent package without SSE2 is flashplugin-11.1.102.63-1-i686.pkg.tar.xz. If you use the packaged version, you have to add IgnorePkg = flashplugin to /etc/pacman.conf.

Flash Player: plugin version still shown older version after upgrade

Firefox

Solution for Firefox: delete file "pluginreg.dat" in user's profile directory.

  • Close firefox
  • Go to /home/<username>/.mozilla/firefox/<profile_folder>/
  • Delete file "pluginreg.dat"

Firefox will automatically rebuild this file once it is started again. Make sure to substitute <username> and <profile_folder> with the appropriate information.

Plugins are installed but not working

A common problem is that the plugin path is unset. This typically occurs on a new install, when the user has not re-logged in before running Firefox after the installation. Test if the path is unset:

$ printenv MOZ_PLUGIN_PATH

If unset, then either re-login, or source /etc/profile.d/mozilla-common.sh and start Firefox from the same shell:

$ source /etc/profile.d/mozilla-common.sh && firefox

Gecko Media Player will not play Apple trailers

If Apple Trailers appear to start to play and then fail, try setting the user agent for your browser to:

QuickTime/7.6.2 (qtver=7.6.2;os=Windows NT 5.1Service Pack 3)