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Firefox briefly freezes while loading a new tab

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I'm running Firefox 71 on Linux. I notice that when I load a page into a new tab (either from middle-clicking links, or entering URL manually), Firefox UI is unresponsive for about 2 seconds. During that time, I'm unable to switch tabs--either by clicking, or with Ctrl+Tab. I tried restarting with all add-ons disabled, but the problem persists.

The problem disappears if i were to create a new temporary profile, though. So it's clear that something in my current profile is screwed up, but not sure what. Other things I've tried: quit Firefox, I vacuumed all `.sqlite` files in my profile; cleaned up all the cached images (not site data, though).

I'm keen to continue using my profile rather than create and setup a new one. Any help to trouble shoot this problem is appreciated.

Thanks.

I'm running Firefox 71 on Linux. I notice that when I load a page into a new tab (either from middle-clicking links, or entering URL manually), Firefox UI is unresponsive for about 2 seconds. During that time, I'm unable to switch tabs--either by clicking, or with Ctrl+Tab. I tried restarting with all add-ons disabled, but the problem persists. The problem disappears if i were to create a new temporary profile, though. So it's clear that something in my current profile is screwed up, but not sure what. Other things I've tried: quit Firefox, I vacuumed all `.sqlite` files in my profile; cleaned up all the cached images (not site data, though). I'm keen to continue using my profile rather than create and setup a new one. Any help to trouble shoot this problem is appreciated. Thanks.
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Additional System Details

Installed Plug-ins

  • Shockwave Flash 32.0 r0

Application

  • User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:71.0) Gecko/20100101 Firefox/71.0

More Information

Dinushi Dhananjani
  • Top 25 Contributor
5 solutions 216 answers
This article will be help to you, https://support.mozilla.org/en-US/kb/firefox-hangs-or-not-responding
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Question owner

I'd have tried Firefox refresh, but the button on this page doesn't work fo me: https://support.mozilla.org/en-US/kb/refresh-firefox-reset-add-ons-and-settings

I'd have tried Firefox refresh, but the button on this page doesn't work fo me: https://support.mozilla.org/en-US/kb/refresh-firefox-reset-add-ons-and-settings
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Question owner

Hm, I had enabled DoH a while ago. Now that I've disabled it again, things appear to be better.

Edit: Probably not.

Hm, I had enabled DoH a while ago. Now that I've disabled it again, things appear to be better. Edit: Probably not.

Modified by Jeenu

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