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Latest Firefox Upgrade issue

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  • Last reply by cor-el

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bold text This is the 2nd time that I've had something weird happen in Firefox after latest upgrade. Today I could connect to my MyUPMC account but could not do anything when there -- spinning -- from Firefox browser. After much troubleshooting I tried Brave browser and got connected and all working immediately. I also tried my iPhone and was successful.

Last problem I had was an anomaly with Amazon which you eventually fixed. Please do not release upgrades until they work.

'''bold text''' This is the 2nd time that I've had something weird happen in Firefox after latest upgrade. Today I could connect to my MyUPMC account but could not do anything when there -- spinning -- from Firefox browser. After much troubleshooting I tried Brave browser and got connected and all working immediately. I also tried my iPhone and was successful. Last problem I had was an anomaly with Amazon which you eventually fixed. Please do not release upgrades until they work.

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You can check for issues with Total Cookie Protection.


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

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.

  • click the shield icon for more detail and possibly disable the protection

You can check the Web Console for relevant-looking messages about blocked content.


You can try these steps in case of issues with webpages:

You can reload webpage(s) and bypass the cache to refresh possibly outdated or corrupted files.

  • hold down the Shift key and left-click the Reload button
  • press "Ctrl + F5" or press "Ctrl + Shift + R" (Windows,Linux)
  • press "Command + Shift + R" (Mac)

Clear the Cache and remove the Cookies for websites that cause problems via the "3-bar" Firefox menu button (Settings).

"Remove the Cookies" for websites that cause problems:

  • Settings -> Privacy & Security
    Cookies and Site Data: "Manage Data"

"Clear the Cache":

  • Settings -> Privacy & Security
    Cookies and Site Data -> Clear Data -> [X] Cached Web Content -> Clear

Start Firefox in Troubleshoot Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration or userChrome.css is causing the problem.

  • switch to the DEFAULT theme: "3-bar" menu button or Tools -> Add-ons -> Themes
  • do NOT click the "Refresh Firefox" button on the Troubleshoot Mode start window