Difference between revisions of "Opera"
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Revision as of 09:30, 15 June 2012
Opera is a web browser and Internet suite developed by Opera Software. The browser handles common Internet-related tasks such as displaying websites, sending and receiving e-mail messages, managing contacts, IRC online chatting, downloading files via BitTorrent, and reading web feeds. Opera consumes approximately 36 MB installed on disk and is built for speed, incorporating numerous options and shortcuts to simply web tasks. : "Opera_(web_browser)". Wikipedia. 19 Sep. 2010. Wikimedia Foundation, Inc. 22 Sep. 2010 <http://en.wikipedia.org/wiki/Opera_(web_browser)>.
- 1 Installation
- 2 Plugins
- 3 Performance tweaks
- 4 Microsoft fonts and Opera
- 5 UI appearance
- 6 Private tabs
- 7 Java Support
- 8 Accessibility Tips
- 9 Troubleshooting
- 10 Additional Resources
Opera can use Mozilla-based plugins; see Browser Plugins for details. The plugin path can be specified under
Settings > Preferences > Advanced > Content > Plug-in Options
Install the official repositories.package from the
Disabling features and services
One of the keys to maximizing application performance is to disable undesired features and services through the native opera:config Preferences Editor.
- Start Opera without the default system tray icon by unchecking the following option:
opera:config#UserPrefs | ShowTrayIcon
Other commonly disabled feature sets include but are not limited to:
- BitTorrent Example Screenshot
- Web Server
Additional command-line options are available for further control over browser features and services:
- Start Opera without the default internal e-mail client
$ opera -nomail
- Alternatively, if you want to permanently disable the internal e-mail client without using "-nomail", you can uncheck the setting "Show E-mail Client" in opera:config
- Start Opera without an ARGB (32-bit) visual, without LIRC infrared control support and
$ opera -noargb -nolirc -nomaillinks
- Start Opera without the internal BitTorrent downloader: uncheck "Enable" under the BitTorrent section in opera:config
Improving Flash performance
- Set the following environment variables before starting Opera, or export the entries in xinitrc, or .bash_profile, or for system-wide changes, to
#!/bin/bash # /usr/bin/urxvtd -q -f -o & export OPERAPLUGINWRAPPER_PRIORITY=0 export OPERA_KEEP_BLOCKED_PLUGIN=0 exec ck-launch-session /usr/bin/jwm
$ OPERAPLUGINWRAPPER_PRIORITY=0 OPERA_KEEP_BLOCKED_PLUGIN=1 opera &
- Another environment variable which may help resolve Flash issues:
See the blog article Flash problems on Linux? for additional details.
Profile in tmpfs
Relocate the browser profile to tmpfs filesystem, including
/tmp for improvements in application response as the the entire profile is now stored in RAM. Another benefit is a reduction in disk read and write operations, of which SSDs benefit the most.
Opera and Opera-beta
Use an active management script for maximal reliability and ease of use.
Refer to the Profile-sync-daemon wiki article for additional info on it.
In the case of opera-next, launch Opera with the
-pd option to set the location of the alternative Opera preferences folder:
$ opera -pd /tmp/.opera
Any number of command-line options may be included in the string:
$ opera -newprivatetab -noargb -nolirc -nomail -nomaillinks -pd /tmp/.opera
Microsoft fonts and Opera
Configure fonts under
Settings > Preferences > Advanced > Fonts. If AUR has been installed before running Opera for the first time, Opera will use those fonts by default, regardless of what is specified by local GTK options, GNOME, or KDE font management. To force existing installations of Opera to use the options set by your font manager:
- Close all running instances of Opera.
- Un-install the AUR package.
- Move the existing profile folder:
mv -i ~/.opera ~/.opera.bak
- Run an instance of Opera and verify that your font manager settings have been applied.
- Restore bookmarks and desired filter files from
~/.operaexcept for the
- Re-install the AUR package, if desired.
- To make the menus look integrated with Qt, install your preferred Qt4 theme and apply it by using
- To make Opera use KDE icons, download a native skin such as fixed_window_skin
- A nice gtk2 skin with tango icon theme can be found here. Integrates very well with Xfce4 and other gtk2 environments.
- Opera has native support for tab cascading and tiling mode. Appropriate buttons can be found by activating the "main" toolbar or by dragging and dropping the buttons anywhere desired, found in appearance (Template:Keypress) -> buttons -> browser.
To browse without leaving obvious traces of the Web sites you visit, you can use a private tab. When you close a private tab, the following data related to the tab is deleted:
- Open the URL (if a URL is defined) in Opera with a private tab.
$ opera -newprivatetab
To ensure only private tabs are used throughout the duration of the browsing session:
Settings > Preferences... > General > Startup > Start without open tabs
- Clear any entries in
Settings > Preferences... > General > Home page option
Settings > Preferences... > Advanced > Tabs > Additional tab options... > Allow windows with no tabs
- (Recommended) Install the open source OpenJDK environment along with the IcedTea-Web browser plugin provided by these two packages: and .
- Alternatively, install the proprietary, closed source Java Runtime Environment from Oracle from the AUR: AUR
See Java#OpenJDK_JVM for additional details and references.
Disable text selection
Grab and scroll mode
Besides setting text selection off, grab and scroll mode makes page scrolling possible with mouse dragging. It is very useful, especially when you have a touchscreen. Copy and paste the link bellow to get to the mentioned setting.
It is also possible to change this setting on the fly by dragging and dropping the appropriate Opera button anywhere desired, found in appearance (Template:Keypress) -> buttons -> browser view.
It is possible to open up any long-clicked link in a new background tab by installing this extension from myopera community.
Virtual On-Screen keyboard (extension)
There is an extension which allows the use of an on-screen virtual keyboard. Further details and installation link can be found here.
Java on Arch64
1. Add to
/etc/profile to make this setting affect all logins:
# openjdk export LD_LIBRARY_PATH=/usr/lib/jvm/java-6-openjdk/jre/lib/amd64/server/ # jre export LD_LIBRARY_PATH=/opt/java/jre/lib/amd64/server/
Alternatively, create a symlink to
# openjdk cd /usr/lib/jvm/java-6-openjdk/jre/lib/amd64 ln -s server/libjvm.so . # jre cd /opt/java/jre/lib/amd64 ln -s server/libjvm.so .
2. Edit the path to Java in Opera: Menu -> Tools -> Preferences -> Advanced -> Content -> Plugin-Options.
#openjdk /usr/lib/jvm/java-6-openjdk/jre/lib/amd64/ #jre /opt/java/jre/lib/amd64/
Slow scrolling on NVIDIA cards
Try running the following command:
$ nvidia-settings -a InitialPixmapPlacement=2
On some computers, http://helion.pl works extremely slow without this hack, making it a perfect site for testing.
Horizontal mouse wheel scrolling
Settings > Preferences > Advanced > Shortcuts > Mouse > Middle-Click Options... > Enable horizontal panning
Settings > Preferences > Advanced > Shortcuts > Mouse > Opera Standard
Settings > Preferences > Advanced > Shortcuts > Mouse > Opera Standard
Settings > Preferences > Advanced > Shortcuts > Mouse > Copy of Opera Standard
- Search the
Backinput contexts and edit the appropriate button shortcuts to
Settings > Preferences > Advanced > Shortcuts > Mouse > Copy of Opera Standardas desired
Launching an external browser
Opera does not display sites well at times. A workaround is to launch the currently displayed page in an external browser.
- Set the following line under
[Site Navigation Toolbar.content]in
Button0, "Chromium"="Execute program, "chromium, "%u", , "Chromium""
- If Firefox is desired, or preferred:
Button0, "Firefox"="Execute program, "firefox", "%u", , "Firefox""
- Any number of command-line options may be included in the string:
Button0, "Chromium"="Execute program, "chromium --block-nonsandboxed-plugins --disable-java --incognito --safe-plugins --start-maximized --user-data-dir=/tmp/.chromium", "%u", , "Chromium""
Opera crashes when starting or closing with gtk2 2.24.7+
You can work around this for now by changing the DialogToolkit option to 4:
This will disable Gtk styling support and hence avoid the issue. It will probably be fixed in the next Opera release (11.60+).