Is this with all websites/pages, some, a few?

Many site issues can be caused by corrupt cookies or cache.

Warning ! ! This will log you out of sites you're logged in to. You may also lose any settings for that website.

• Delete cookies to remove the information websites have stored on your computer {web link}

• How to clear the Firefox cache {web link}

If there is still a problem, 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). Did this help?

While you are in safe mode;

Try disabling graphics hardware acceleration in Firefox. Since this feature was added to Firefox it has gradually improved but there are still a few glitches.

How to disable Hardware Acceleration {web link}

If you use extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) that can block content (Adblock Plus, NoScript, Disconnect, Ghostery, Privacy Badger, uBlock Origin) always make sure such extensions do not block content.

• make sure your extensions and filters are updated to the latest version
• https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems

Firefox shows a purple shield instead of a gray shield at the left end of the location/address bar in case Enhanced Tracking Protection is blocking content. You can click shield icon for more detail and possibly disable the protection. You can check the Web Console for messages about blocked content.

• https://support.mozilla.org/en-US/kb/enhanced-tracking-protection-firefox-desktop
• https://support.mozilla.org/en-US/kb/trackers-and-scripts-firefox-blocks-enhanced-track

Fred: Cookies and cache are cleared a couple or a few times daily. Many times on Outlook.com email and one other website. It interrupts me and returns me to a page, although I am never sure why... (and dont always remember which website).

Extensions automatically updated. Hardware acceleration already disabled.

This is a recurring issue. Do not remember if I tried safe mode last time. ++++++++++ cor-el,

Have PB and ABP. Everything set to be updated automatically, and filters I manually increase. Have never been able to read the data FF provides in most of their features.

Forgot about the extra protection, but had NO idea it related to script errors. How do I check to see if if extensions block content??

Thank you both.

I just checked the OPTIONS under extensions. Only about three offered that choice. There was nothing obvious - or obscure.

I had Twitter, Outlook, and a third website open and the script error went nuts. Different messages, but it kept screwing up all pages. I disabled enhanced blocking until the script error/s returned almost immediately, so I re-enabled.

Untenable - Outlook is still loading. Reloads each time I hit CONTINUE.

Will try safe mode soon. Terrible and really terrible. All seem to bring me back (force me) to Outlook.com. Does that mean it is the victim or the perpetrator???

Ty.

While going into safe mode, (after shutting down, but before up again). I got two script errors. After entering SAFE MODE, I got two script errors.

Next?????

Thank you.

What is/are the exact error message(s) ?

‘A script on this page may be busy, or it may have stopped responding. You can stop the script now, or you can continue to see if the script will complete.

Script: https://pro.fontawesome.com/releases/v5.4.2/js/all.js:81253400‘

Every other error calmed down after I disabled another UP ARROW (return to top) addon last night. (This addon seems to ALWAYS be an issue, regardless of developer). Just got my first error today, after 1:45 minutes of login.

Thank you.