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new ui is slow and hangs

  • 8 replies
  • 207 have this problem
  • 10688 views
  • Last reply by titaob

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After the update yesterday to Firefox Quantum, I can no longer use Firefox on my desktop. It is slow, it hangs and then freezes. I've tried everything in the troubleshooting section (profiles, drivers, refresh, fresh install, everything.) I am posting this message from...gasp...Microsoft Edge. I really hope there is someone who can help me, I really don't want to have to leave Firefox!

Chosen solution

great, please try the following which should hopefully take care of this lag: go to the firefox menu ≡ > options > privacy & security panel and under permissions check the setting to prevent accessibility services from accessing your browser.

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All Replies (8)

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Please uninstall Firefox. Then Delete the Mozilla Firefox Folders in C:\Program Files and C:\Program Files(x86) Then restart system. Then run Windows Disk Cleanup. Then run it again and click the button that says Cleanup System Files. Note: your Firefox Profile is saved.

Reinstall with Current Release Firefox 57.0 with a Full Version Installer https://www.mozilla.org/firefox/all/

https://support.mozilla.org/en-US/kb/upgrade-graphics-drivers-use-hardware-acceleration TRY NO HARDWARE ACCELERATION Most issues are caused by out dated and corrupted drivers. If do not know what your card is : GPU-Z will tell you this https://www.techpowerup.com/gpuz/

FIREFOX TO SLOW

Start Firefox in Safe Mode {web link} by holding down the <Shift> (Mac=Options) key, and then starting Firefox.

A small dialog should appear. Click Start In Safe Mode (not Refresh). Is the problem still there?

https://support.mozilla.org/kb/Firefox+is+already+running+but+is+not+responding

https://support.mozilla.org/en-US/kb/firefox-slow-how-make-it-faster

https://support.mozilla.org/en-US/kb/firefox-uses-too-many-cpu-resources-how-fix

https://support.mozilla.org/en-US/kb/firefox-uses-too-much-memory-ram

https://support.mozilla.org/en-US/kb/firefox-hangs-or-not-responding

Please let us know if this solved your issue or if need further assistance.

Modified by Shadow110

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I did all of the above. Still hangs and freezes.

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thanks for reporting this. could you go to the firefox menu ≡ > help ? > troubleshooting information, copy the contents of that page and paste them here into a reply on the forum (or if it's to long through a site like https://pastebin.mozilla.org/ and provide the link here)?

this might give us a clue what is going on. thank you!

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Chosen Solution

great, please try the following which should hopefully take care of this lag: go to the firefox menu ≡ > options > privacy & security panel and under permissions check the setting to prevent accessibility services from accessing your browser.

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That did it I think! Oh my gosh, I'm so appreciative. I'll see if it is still working tomorrow and thene "solved the problem" click. Already it is amazing I can type this to you in Firefox!

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TwinsMomVA said

After the update yesterday to Firefox Quantum, I can no longer use Firefox on my desktop. It is slow, it hangs and then freezes. I've tried everything in the troubleshooting section (profiles, drivers, refresh, fresh install, everything.) I am posting this message from...gasp...Microsoft Edge. I really hope there is someone who can help me, I really don't want to have to leave Firefox!

TwinsMomVA said

After the update yesterday to Firefox Quantum, I can no longer use Firefox on my desktop. It is slow, it hangs and then freezes. I've tried everything in the troubleshooting section (profiles, drivers, refresh, fresh install, everything.) I am posting this message from...gasp...Microsoft Edge. I really hope there is someone who can help me, I really don't want to have to leave Firefox!

great, please try the following which should hopefully take care of this lag: go to the firefox menu ≡ > options > privacy & security panel and under permissions check the setting to prevent accessibility services from accessing your browser.

This worked for me! Thank you!

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can't find where this box to check is on windows 8.