I have downloaded and installed some addons, such as download status bar etc and they are enabled but for some reason they do not show up when they are needed, the same happens for personas and themes they just wont show up. I have tried resetting my browser but nothing has happened
If you see disabled, not compatible, extensions in "Tools > Add-ons > Extensions" then click the Tools button at the left end side of the Search Bar ("Find Updates" button in older Firefox versions) to check if there is a compatibility update available.
If this hasn't helped then also try to delete the addons.sqlite file.
hello, it is a known issue that light-weight themes are currently not shown when firefox is set to never remember history (a.k.a. always run in private browsing mode) in firefox/tools > options > privacy. this will be corrected in the upcoming firefox release.
maybe the download statusbar addon is affected by the new download manager that shipped in firefox 20 - but i'm not sure about that...
Wholly annoying that I add some addons to the browser and they fail to show up (like bit.ly). I've tried deleting the extension.xxxx files, and the localstore.rdf file - no joy! I'm using Firefox 22.0 on Windows 8 Enterprise, and am logged in as Administrator.