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Customizing Firefox

This article provides helpful information when you want to create a custom version of Firefox.

Including extensions with your distribution of Firefox

Requires Gecko 2.0(Firefox 4 / Thunderbird 3.3 / SeaMonkey 2.1)

Starting with Gecko 2.0 (Firefox 4 / Thunderbird 3.3 / SeaMonkey 2.1), you can easily bundle extensions with your customized Firefox distribution that automatically get installed the first time a user starts up your distribution. This is done each time the user starts up an updated version of your Firefox distribution, unless they've either uninstalled the extension or have a newer version of it already installed.

To do this, simply place the extensions in the distribution/extensions directory in the application's distribution directory.

Note that installing using the regular Firefox installer will remove the distribution directory and any of these extensions that are there to leave a clean Firefox distribution.

Note: This feature can be disabled by setting the extensions.installDistroAddons preference to false.

You can get a list of the extensions installed this way by looking for preferences whose names are "extensions.installedDistroAddon." followed by the extension's ID.

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Contributors to this page: rstrong, Mossop, coffeina, Sheppy, rebrec
Last updated by: rstrong,