[Bug 342587] How to... return to the firefox default settings?

[Gerrit38]

Dear Mr. Vivirito,

possibly I mislead you, but I am not 100% sure. I had stated, that in
the safe  mode of firefox the SHELL Oil Company's advertisement did not
appear any longer, thus its popup window remainder does no longer mask
useful fields with blank areas. I fear, that the advertisement was
switched off just when I changed to the safe mode by 

firefox --safe-mode

Thus my statement of clear remedy is not reliable, I fear.

I now face another problem: How can I return to the standard German mode
of firefox? My menu is now in the English language, and changing the
language by EDIT/PREFERENCES/CONTENT/LANGUAGES/CHOOSE two English
versions (US and UK) are shown; inserting GERMAN and moving it to the
top of the stack does not change the English menu. Removing the ENGLISH
versions and restarting does not help, too.

I guess that I will have to give a shell order to return to the German
mode. In my literature I do not find useful commands for this purpose.
Can you give me a hint what to do?

Kind regards
Gerrit Plümecke

-- 
pop up window leaves blank area when closed
https://bugs.launchpad.net/bugs/342587
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