Using Firefox 18.0. My add-ons have all disappeared.
My add-ons have all disappeared. Tools>add-ons>Get Add-ons they will not load. Just get a continuous ‘loading’. My extensions are empty. I only really remember having McAfee Site Advisor but I could have had more. I use it daily. Tried previous solutions from https://support.mozilla.org/en-US/questions/1058393. Site Advisor is not there in any folder. Thank you.
Modified by Marvin28
Chosen solution
It is possible that there is a problem with the file(s) that store the extensions registry.
Delete the extensions.* files (e.g. extensions.json, extensions.sqlite, extensions.ini) 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 hasn't helped then also delete the addons.json file.
Read this answer in context 0Additional System Details
Installed Plug-ins
- Shockwave Flash 19.0 r0
- Google Update
- 5.1.40728.0
- Adobe PDF Plug-In For Firefox and Netscape 10.1.15
- VLC media player Web Plugin
- Next Generation Java Plug-in 11.40.2 for Mozilla browsers
- NPRuntime Script Plug-in Library for Java(TM) Deploy
- ActiveTouch General Plugin Container Version 105
- GEPlugin
- NVIDIA 3D Vision plugin for Mozilla browsers
- NVIDIA 3D Vision Streaming plugin for Mozilla browsers
- Unity Player 3.5.5f2
- Cortona Netscape Browser Plug-In (6, 0, 0, 179)
- Windows Presentation Foundation (WPF) plug-in for Mozilla browsers
Application
- User Agent: Mozilla/5.0 (Windows NT 6.0; rv:18.0) Gecko/20100101 Firefox/18.0
More Information
Chosen Solution
It is possible that there is a problem with the file(s) that store the extensions registry.
Delete the extensions.* files (e.g. extensions.json, extensions.sqlite, extensions.ini) 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 hasn't helped then also delete the addons.json file.
hi Marvin28, sorry but firefox 18 is horribly outdated & insecure...
please start by updating firefox to the latest version (that's firefox 41.0.1 at the moment)!
Look on your desktop. Do you see a folder called; Old Firefox?
https://support.mozilla.org/en-US/kb/recovering-important-data-from-an-old-profile
https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles
Question owner
Thank you all for the replies. Thank you cor-el I deleted 2 files you suggested extensions.json & extensions.sqlite but couldn't find extensions.ini. However went to extensions & they loaded in immediately. I think I have some baddies on my PC. Now Firefox says that Siteadvisor is incompatible. Also the REMOVE button is gone across from it.
Regarding updating – I have always liked the ability to turn off JavaScript & and disable all cookies. I did try it a few months but did not like the newer features, the look and the way you disable java. I may try the newest again if I can’t get Siteadvisor to work.
Java and JavaScript are different languages. To avoid confusion, see:
The check boxes to enable/disable JavaScript and load images automatically have been removed from "Options > Content".
You can look at an extension like this: