firefox is being unresponsive for like 20 seconds every few minutes (doesn't crash)
what the title says, nothing else I can elaborate on.
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I'd guess it's due to some add-on.
Try Firefox Troubleshoot Mode to see if the problem goes away. Firefox Troubleshoot Mode is a special diagnostic mode that temporarily turns off hardware acceleration, disables add-ons (extensions and themes) and resets some settings. See the Diagnose Firefox issues using Troubleshoot Mode article for details.
You can restart in Firefox Troubleshoot Mode from the Help menu:
- Click the menu button
, click Help, select Troubleshoot Mode and click Restart in the "Restart Firefox in Troubleshoot Mode?" dialog that opens.
When the Firefox Troubleshoot Mode window appears, select "Open".
If the issue is not present in Firefox Troubleshoot Mode, your problem is probably caused by an extension. Please follow the steps in the Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems article to find the cause.
To exit Firefox Troubleshoot Mode, just close Firefox and wait a few seconds before opening Firefox for normal use again. (If you can't exit Firefox Troubleshoot Mode, please see Firefox is stuck in Troubleshoot Mode).
When you figure out what's causing your issues, please let us know. It might help others with the same problem.