If not there yet update to 57.0.2 https://support.mozilla.org/en-US/kb/update-firefox-latest-version Fix was included in prior update 57.0.1

If still issues after update  : You could try this please : Go the Menu then Tools --> Options --> Performance and untick everything. change the recommended size lower then see how it runs. Note: 0 = No Multiprocessor = slow again. TRY 2 Restart Firefox after making these changes please.

Run Windows Disk Cleanup. (Note this program should be Pinned and ran weekly, If never done below expect 10's of gig's) Then run it again and click the button that says Cleanup System Files.

Defrag.

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

Pkshadow said

If not there yet update to 57.0.2 https://support.mozilla.org/en-US/kb/update-firefox-latest-version Fix was included in prior update 57.0.1 If still issues after update  : You could try this please : Go the Menu then Tools --> Options --> Performance and untick everything. change the recommended size lower then see how it runs. Note: 0 = No Multiprocessor = slow again. TRY 2 Restart Firefox after making these changes please. Run Windows Disk Cleanup. (Note this program should be Pinned and ran weekly, If never done below expect 10's of gig's) Then run it again and click the button that says Cleanup System Files. Defrag. Please let us know if this solved your issue or if need further assistance.

This took care of my issue, thanks so much for your assistance. N

Hello,

I am glad to hear that your problem has been resolved. If you haven't already, please select the answer that solves the problem. This will help other users with similar problems find the solution more easily.

Thank you for contacting Mozilla Support.