Comment 5 for bug 281571

SOLVED !!!!

TO ALL FRIENDS "WORLDWIDE" (any language you use...)

This is the solution:

1) install the correct and updated (3.0.3) XPI language file, after downloading it from Firefox website (by doing so you'll bring you Firefox interface in your preferred language);

2) Close all Firefox windows, open a terminal and type:

gksu -u root firefox <----- this will launch Firefox in "root mode"

after typing the command above, press "enter" and you'll be prompted for the password (usually the one you use during the login..) and after Firefox will open "in root mode" (Firefox interface will appear in english, and with the default homepage...but don't care...).

Now into the Firefox window go to "Tools" ---> "Additional Coponents" ---> "Languages" and "as a charme" the UNINSTALL button for the "incompatible" (3.0.1) language(s) components will be available!!

Just uninstall ALL the obsolete language(s) component(s) you want to get rid of...after that press the button "restart Firefox" and Firefox will be rebooted always in "root mode".

Check if the obsolete language(s) component(s) no longer exist and FINALLY close Firefox and then re-launch it in "THE NORMAL WAY".....et voilà!
Your Firefox will be NOW "clean" and in your preferred language!!! :)

Glad to be usefull for the community!!!
Cheers & Peace to all :)