You could be looking in the wrong spot. Lets just make sure. Can you post a screenshot of the Extentions page of your Add ons (about:addons).

Thank you!!

Have a great day!!

Jon

Separate Issue; Your System Details shows;

Installed Plug-ins

Shockwave Flash 17.0 r0 Shockwave Flash 15.0 r0

Having more than one version of a program may cause issues. You must remove the older programs. Then get the current full installer.

Flash: Grab the uninstaller from here: Uninstall Flash Player | Windows Uninstall Flash Player | Mac

Then reinstall the latest version.

Flash Player Version 17.0.0.169
https://www.adobe.com/products/flashplayer/distribution3.html

Make sure you are not running in Safe Mode.

https://support.mozilla.org/en-US/kb/firefox-is-stuck-in-safe-mode

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.

• 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 or not compatible extensions in "Firefox/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 possible addons.json and addons.sqlite files.

i just removed all the add on's and reinstalled them. i have no idea why they disappeared. thanks

had to just remove all the add on's and re-install them thanks

Hello,

I am glad to hear that your problem has been resolved. If you haven't already, please select the answer that solves the problem. This will help other users with similar problems find the solution more easily.

Thank you for contacting Mozilla Support.

what i did was just remove all of them in firefox and then reinstall them and they all came back to there normal states. also at that time i updated to 37.0.2 thanks for the ideas.

Good Work Well Done.