Some of my addons have dissapeared over night! Such as Fireshot screen capture & Google Search. Fireshot Screen Capture was not even in the add-ons menue.
I lost FireShot Sreen Capture, Google Search, and probably more over the last 48 hours, starting on January 14, 2016 The only extension I did not loose was Ginger Spell checker which was disabled because It was incompatible with FireFox on the last couple of Fire Fox Upgrades. The other extensions that I lost I will figure out as time goes on. I did not loose any of my plug-Ins. When I went to add-ons & plugins on your website I could not find Fire Shot Screen. I did find it when I searched on the Web. I just find this a little unusual sine I have been using Fire Shot Screen Capture for about 6 years, as well as other add-ons and Plug-ins. I just wanted to share that with you. Thanks. Regards,
Doug Keenan
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This will disable add-on signature enforcement; Enter about:config into your Firefox address bar Click the I'll be careful button Find xpinstall.signatures.required in the list Right click the preference Select Toggle until the value is false https://support.mozilla.org/en-US/kb/add-on-signing-in-firefox
https://wiki.mozilla.org/Firefox/AddOns/Status/Updates#Exec_Summary “Currently targeting Signing with no pref to turn off in Firefox 47”
Do you have an "Old Firefox Data" folder on the desktop in case you have used the the Refresh feature in Firefox and have created a new profile?
It is possible that there is a problem with files in the profile folder that store the extensions registry.
Delete the extensions.* files (e.g. extensions.json, extensions.ini, extensions.sqlite) and compatibility.ini in the Firefox profile folder to reset the extensions registry.
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 or not compatible extensions in "Firefox menu button/Tools > Add-ons > Extensions" then click the Tools button at the left end of the Search bar to check if there is a compatibility update available.
If this didn't help then delete addons.json and possibly prefs.js in case there is a problem with preferences.
You can use this button to go to the current Firefox profile folder:
- Help > Troubleshooting Information > Profile Directory: Show Folder (Linux: Open Directory; Mac: Show in Finder)
- http://kb.mozillazine.org/Profile_folder_-_Firefox