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Firefox (Windows 7) will randomly disable keyboard input system wide. I have found that opening a new tab and loading a random page like google (by clicking a bookmark) can sometimes fix it.

It happens many times throughout the day. Does anyone know how to fix this?

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  • do You use addons/plugins?
    – Divin3
    Sep 23, 2015 at 6:06
  • Yes, just pretty ordinary ones: Adblock Plus, Webmail Adblocker, video download helper, and one that's added by kaspersky.
    – user500665
    Sep 23, 2015 at 6:30
  • Can You disable them for testing? One of them might cause some compatibility issue. The best way to find out is to disable all and see if the problem appears again.
    – Divin3
    Sep 23, 2015 at 6:40
  • I'll try that, but because it's a seemingly random occurrence it will take some time to see if it has changed anything.
    – user500665
    Sep 23, 2015 at 7:11
  • Assuming it is not a virus, You can only find most of these kind of problems by testing. Another choice You have is to contact Mozilla support support.mozilla.org
    – Divin3
    Sep 23, 2015 at 9:49

1 Answer 1

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I was having this problem as well (but with Windows 10), and I noticed we both have Kaspersky in common.

Disabling the "Kaspersky Protection" add-on resolves the issue for me.

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