how to stop extensions disapearing from the menu, eg, Quit
On starting firefox the addons are in the menu (accessed pressing the virtical dots in the top right corner) then after a short time of about 10 seconds & or When a web page is loaded the addons dissapear from the listing, The only ways to bring them back is to restart firefox or disable/enable the addon's Firefox is up to date (v21, automatic update is on) thanks
Alle svar (1)
It is possible that there is a problem with the file(s) that store the extensions registry.
Delete the files extensions.* (e.g. extensions.sqlite, extensions.ini, extensions.cache) and compatibility.ini in the Firefox profile folder to reset the extensions registry.
https://support.mozilla.org/kb/Profiles
New files will be created when required.
See "Corrupt extension files":
http://kb.mozillazine.org/Unable_to_install_themes_or_extensions https://support.mozilla.org/kb/Unable+to+install+add-ons
If you see disabled, not compatible, extensions in "Tools > Add-ons > Extensions" then click the Tools button at the left side of the Search Bar (or click the "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.
Ændret af Amit Kumar Thakur den