How can I simply return to Firefox 56.0.2 which was not SLOW.
My Firefox was automatically updted to 57.0 and it was almost stopping. 'Refreshing' could only make it work slowly. How can I simply return to Firefox 56.0.2 which was not SLOW?
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if want to try fixing ver 57 : Go to the Firefox 3 Bar Menu --> Help ? --> Troubleshooting Information Page and take a look in the Accessibility section if accessibility is set to "true" there. if yes, go to the Firefox 3 Bar Menu --> Options --> Privacy & Security panel and under Permissions check the setting to Prevent Accessibility Services from accessing your browser.
There are others if want to try, just ask.....
Update your Video Card Drivers.
Going back : unfortunately 56.0.2 and below is no longer safe to use for every day use do to secuity issues, but 52.5.0 ESR is. It will continue to get security updates until May 2018, and you can download and install it from this page: https://www.mozilla.org/en-US/firefox/organizations/all/ Note : Legacy Extensions will be deleted or removed in any version update after May 2018.
You should make a backup of your Profile before going back and just because: https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles
Please let us know if this solved your issue or if need further assistance.