Version 21.0a1 (2013-01-29) I keep changing the value of browser.urlbar.trimURLs, but it reverts to the default value after restart of Firefox. This is very annoying. I hate the trimming feature, now I can't even turn it off!
Afaict, there's nothing in browser resetting that pref, looks like you may have some other issue, either a read-only profile or an add-on issue? Also try checking http://support.mozilla.org/en-US/kb/how-to-fix-preferences-wont-save#w_specific-preferences-are-not-saving
wfm with Mozilla/5.0 (Windows NT 6.1; WOW64; rv:21.0) Gecko/20130128 Firefox/21.0 20130128000459 either broken prefs.js, an addon issue or you have a user.js file that overrides the value. Please try a new profile.
I think this is caused by Skype as it is holding a handler to prefs.js. (Referring to an unreleased version.)
We can not reproduce the issue
Status: UNCONFIRMED → RESOLVED
Last Resolved: 6 years ago
Resolution: --- → WORKSFORME
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