Please Try : go to the Firefox 3 Bar Menu --> Options --> Privacy & Security panel and under Permissions check (put a tick in the box) the setting to Prevent Accessibility Services from accessing your browser.

Monitor in Task Manager. Should stay below 2 gigs. If excessive then do below and monitor and change if need to...Test and go up again , go back down, it will eventually get a zone you and it can live with.

Go to the 3 Bar Menu then Options --> General --> Performance and untick everything. change the recommended size lower then see how it runs. Note: 1 = No Multiprocessor = slow again. Try 2 Restart Firefox after making these changes please.

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

I am still having problems

Create a new profile as a TEST to check if your current profile is causing the problem.

• https://support.mozilla.org/en-US/kb/profiles-where-firefox-stores-user-data
• https://support.mozilla.org/kb/profile-manager-create-and-remove-firefox-profiles
• http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Profile_issues

If the new profile works then you can transfer files from a previously used profile to the new profile, but be cautious not to copy corrupted files to avoid carrying over the problem. Never work with original files.

• https://support.mozilla.org/en-US/kb/recovering-important-data-from-an-old-profile
• http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox

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

I tried creating a new profile but the flickering was still present

Think you need to reinstall your Video Card Drivers for GeForce GTX 1060 6GB/PCIe/SSE2 . Errors : featureLog: {u'fallbacks': [], u'features': [{u'status': u'blocked', u'description': u'Compositing', u'name': u'HW_COMPOSITING', u'log': [{u'status': u'blocked', u'message': u'Acceleration blocked by platform', u'type': u'default'}]}, {u'status': u'unavailable', u'description': u'OpenGL Compositing', u'name': u'OPENGL_COMPOSITING', u'log': [{u'status': u'unavailable', u'message': u'Hardware compositing is disabled', u'type': u'default'}]}, {u'status': u'unavailable'

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

I tried reinstalling the drivers (nvidia-387.34) but the flickering is still there.