X
Tap here to go to the mobile version of the site.

Support Forum

Firefox is extremely slow until I restart with offline Windows Defender scan

Posted

Firefox has been extremely laggy and slow lately. I've tried every "quick fix" I've found online, to include refreshing, sfc /scannow, disabling extensions, re-installing firefox, running malware scans, etc. This started after a cluster of windows, firefox, NVIDIA updates about a week ago, and I haven't been able to pinpoint the source of the issue. So far the only thing that brings the browser back to full speed is restarting my computer with an offline Windows Defender scan. It never actually finds anything, but when the computer restarts Firefox works at regular speed until it is locked for a couple hours or restarted. Any thoughts?

Firefox has been extremely laggy and slow lately. I've tried every "quick fix" I've found online, to include refreshing, sfc /scannow, disabling extensions, re-installing firefox, running malware scans, etc. This started after a cluster of windows, firefox, NVIDIA updates about a week ago, and I haven't been able to pinpoint the source of the issue. So far the only thing that brings the browser back to full speed is restarting my computer with an offline Windows Defender scan. It never actually finds anything, but when the computer restarts Firefox works at regular speed until it is locked for a couple hours or restarted. Any thoughts?

Chosen solution

thanks for following up. the behaviour you're seeing may be the same as https://bugzilla.mozilla.org/show_bug.cgi?id=1575216 which just received a patch on firefox 70 beta. could you try if the problem is still reproducible there?: https://www.mozilla.org/firefox/beta/all/

Read this answer in context 1
Quote

Additional System Details

Application

  • User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:69.0) Gecko/20100101 Firefox/69.0

More Information

philipp
  • Top 25 Contributor
  • Moderator
5306 solutions 23423 answers

hi, would you be able to capture and share a performance profile over 15-30 seconds while the lag is occurring? https://developer.mozilla.org/en-US/docs/Mozilla/Performance/Reporting_a_Performance_Problem

hi, would you be able to capture and share a performance profile over 15-30 seconds while the lag is occurring? https://developer.mozilla.org/en-US/docs/Mozilla/Performance/Reporting_a_Performance_Problem
Was this helpful to you?
Quote

Question owner

First link is just scrolling up and down on the Gecko instructions page. Page lagged out during scrolling.

https://perfht.ml/2LJ6KBs

Second link is searching a word on google and scrolling the results, then clicking on two of the links. Same results, delayed response. Also had delayed response just clicking on the gecko button, similar to lag when trying to open Firefox settings or bookmarks menu.

https://perfht.ml/2LG2lPG

First link is just scrolling up and down on the Gecko instructions page. Page lagged out during scrolling. https://perfht.ml/2LJ6KBs Second link is searching a word on google and scrolling the results, then clicking on two of the links. Same results, delayed response. Also had delayed response just clicking on the gecko button, similar to lag when trying to open Firefox settings or bookmarks menu. https://perfht.ml/2LG2lPG
Was this helpful to you?
Quote
philipp
  • Top 25 Contributor
  • Moderator
5306 solutions 23423 answers

Chosen Solution

thanks for following up. the behaviour you're seeing may be the same as https://bugzilla.mozilla.org/show_bug.cgi?id=1575216 which just received a patch on firefox 70 beta. could you try if the problem is still reproducible there?: https://www.mozilla.org/firefox/beta/all/

thanks for following up. the behaviour you're seeing may be the same as https://bugzilla.mozilla.org/show_bug.cgi?id=1575216 which just received a patch on firefox 70 beta. could you try if the problem is still reproducible there?: https://www.mozilla.org/firefox/beta/all/
Was this helpful to you? 1
Quote

Question owner

That seems to have solved it. Sorry for the delay, I wanted to give it some time and a few power cycles to see if it held. I haven't been able to reproduce the issue after installing the beta patch. Thanks!

That seems to have solved it. Sorry for the delay, I wanted to give it some time and a few power cycles to see if it held. I haven't been able to reproduce the issue after installing the beta patch. Thanks!
Was this helpful to you?
Quote
Ask a question

You must log in to your account to reply to posts. Please start a new question, if you do not have an account yet.