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All my Firefox 42.0 Add-ons are always active and other options are greyed out???

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All my Firefox 42.0 Add-ons are always active and other options are greyed out??? How can one fix this issue because I want to be able to give permission before a Add-on is active by selecting the "Ask to Activate" option!

All my Firefox 42.0 Add-ons are always active and other options are greyed out??? How can one fix this issue because I want to be able to give permission before a Add-on is active by selecting the "Ask to Activate" option!

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Security Issue: Update your Flash Player Version 19.0.0.226
https://www.adobe.com/products/flashplayer/distribution3.html
Note: Windows users should download the ‘’’active_x’’’ for “Internet Explorer,” and the ‘’’plugin’’’ for “Plugin-based browsers” (like Firefox).

Note: Edge on Win10 does not use ActiveX version but its own Flash.

See if there are updates for your graphics drivers https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration


Note: Avast has been known to cause issues in Firefox. Disable it as a test.


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":