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CategorySoftware CategoryNetworkApplication


Addons can be installed from the Debian repositories or from inside the browser by visiting https://addons.mozilla.org. Each method has its own advantages

Debian repositories



Free-software only

Both free and non-free



For each user individually

Browser integration

Can't uninstall from the addons menu



Dependent on Debian packager



Some scrutiny from Debian packagers

Whatever comes from the addon

The place where Mozilla is installed is

 /usr/lib/mozilla/mozilla-bin/ and /usr/bin/mozilla

The user's profile is installed in


 (i.e. /home/user/.mozilla/profile_name; where profile_name is the mozilla user's profile name).

The Mozilla start page (for both Mozilla Web-Browser and Mozilla Firefox ) is in


Plug-ins directory

The mozilla plug-in directory is generally


If installing plugins without root permissions, use


 (i.e. /home/user/.mozilla/plugins )

instead of the plugins subdirectory where Mozilla is installed. You may have to create this directory first.

Mozilla Firefox also uses the same plugins folder.

For a plug-in, you have to install a .so and .xpt file.

You can change the plug-ins to use the system default, going to Edit Preferences Advanced / Plug-in and script and editing it to indicate the folder where the program is.

Type about:plugins in the mozilla address bar to see the plug-ins installed.

See :


Firefox 19.0 introduced a built-in browser PDF viewer that is enabled by default. Earlier versions of Firefox can use PDF Viewer as an addon.

Gnome's Evince will handle PDF. Install Mozplugger to enable Evince instances embedded inside the browser window. This also enables viewing LibreOffice documents embedded in the browser window, provided you have the required LibreOffice packages installed.

Also, If you installed Adobe Acrobat reader, copy nppdf.so to your Mozilla plugins directory and ensure a copy of acroread is in your path.

Flash player

See FlashPlayer


On Linux, Mozilla requires JRE 1.4.2 or later ( plug-in application/x-java-vm). Remember that the SDK contains the JRE so you don't need to download both.

Enable Java in Mozilla

The easiest way is to install ?BlackDownJava that includes Java plug-in for mozilla.


There is a browser plugin for Mozilla and Firefox available by installing gecko-mediaplayer (based on MPlayer). Another media player plugin is mozilla-plugin-vlc (based on VLC)

A browser plugin is not mandatory.

See also

CategorySoftware CategoryNetworkApplication