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My standard language for Firefox and Thunderbird is Dutch. When I use the terminal to open firefox or thunderbird with the -ProfileManager option, the resulting ProfileManager is in English. How can I change the language to Dutch in the ProfileManager?

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You mean that only profile manager is English while the main app is in Dutch? – jasmines May 29 '12 at 7:43
How did you get your Firefox into Dutch? Was it with an Add-On? If so, note that Add-Ons are Firefox-profile-specific, so they won't affect Profile Manager. If I download an actual Dutch-localized version of Firefox directly from Mozilla (from ), its ProfileManager opens up in Dutch for me. – dholbert Jun 1 '12 at 18:06
I did install firefox-locale-nl only – erkan Jun 10 '12 at 12:23
The firefox-locale-nl .deb package installs a Firefox addon and search plugin for use in profiles, rather than customizing the actual profile-independent firefox installation. See dpkg -L firefox-locale-nl -- that shows that the package just adds files in /usr/lib/firefox-addons and /usr/lib/firefox/distribution/searchplugins. – dholbert Jul 25 '12 at 23:28

You can download a fully localized version of Firefox here: and then extract that in e.g. /home/{yourusername}/programs/firefox/

Then, create a directory /home/{yourusername}/bin/ and create a symbolic link "firefox" in that directory, pointing to /home/{yourusername}/programs/firefox/firefox.

Starting from the next time you log in, all invocations of "firefox" (including through the system menus) should invoke your own localized version of Firefox instead of the Ubuntu-maintained version.

(This is what I do, because I'm using a nightly build of Firefox instead of the Ubuntu-maintained version.)

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