Fixing broken Firefox preferences (side menu plus a question mark in a yellow square).

Hi there.

I am using Firefox Nightly 32.0a1 and all of the sudden I have noticed this problem:


when trying to open the preferences…

Possibly You have the same problem. Fix it.

1) Close Firefox completely (as in all windows).
1) Open ~/.mozilla/firefox/XXXXXXXXXX.default/ where the “XXXXXXXXXX” is a random string.
2) Find and open file prefs.js in your favorite text editor.
3) Find and remove this line:

user_pref("browser.cache.memory.enable", false);

4) Save the file.
5) Reopen browser and test the preferences window.

There – that fixed it for me.





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