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Bug in Latest Release 91.0.1

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  • Last reply by cor-el

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I just installed the latest Firefox relese (91.0.1) to my Windows 8.1 PC. I have restarted FF and also since this bug re-booted the PC, and tried FF in troubleshoot mode. All same issue.

Ebay checkout is not working, when it was immediately before - you go to checkout, and it just sits on the page, without the 'pay' button appearing (just spinning disc) you click to go through to either PayPal or enter Credit card details ever coming up. The page stalls. This exact page was working fine immeditely before the FF update download and install, and it does work fine on other Browsers, because I just used Chrome and completed the transaction as normal, so this is DEFINITLY an issue with the new update. Please fix ASAP, and roll back in the mean time.

I just installed the latest Firefox relese (91.0.1) to my Windows 8.1 PC. I have restarted FF and also since this bug re-booted the PC, and tried FF in troubleshoot mode. All same issue. Ebay checkout is not working, when it was immediately before - you go to checkout, and it just sits on the page, without the 'pay' button appearing (just spinning disc) you click to go through to either PayPal or enter Credit card details ever coming up. The page stalls. This exact page was working fine immeditely before the FF update download and install, and it does work fine on other Browsers, because I just used Chrome and completed the transaction as normal, so this is DEFINITLY an issue with the new update. Please fix ASAP, and roll back in the mean time.

Chosen solution

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You can reload webpage(s) and bypass the cache to refresh possibly outdated or corrupted files.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

You can remove all data stored in Firefox for a specific domain via "Forget About This Site" in the right-click context menu of an history entry ("History -> Show All History" or "View -> Sidebar -> History").

Using "Forget About This Site" will remove all data stored in Firefox for this domain like history and cookies and passwords and exceptions and cache, so be cautious. If you have a password or other data for that domain that you do not want to lose then make sure to backup this data or make a note.

You can't recover from this 'forget' unless you have a backup of involved files.

If you revisit a 'forgotten' website then data for that website will be saved once again.

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All Replies (3)

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Make sure you are not blocking content.

Diagnose Firefox issues using Troubleshoot(Safe) Mode {web link}

A small dialog should appear. Click Start In Troubleshoot(Safe) Mode (not Refresh). Is the problem still there?


https://support.mozilla.org/en-US/kb/enhanced-tracking-protection-firefox-desktop


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.

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Thanks for the reply. As mentioned, I had already done these - same issue. I completed the tx in Chrome without any issue - and this occured directly after the 91.0.1 upgrade, so logical deduction means this can only have been caused by an issue in the upgrade.

Unfortunately I dont think I can revert to the prior version, which worked?

Not sure how I will test though, as I also completed my purchse so no more to make. Hopefully Mozilla will fix this ASAP.

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Chosen Solution

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 related 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 -> 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

You can remove all data stored in Firefox for a specific domain via "Forget About This Site" in the right-click context menu of an history entry ("History -> Show All History" or "View -> Sidebar -> History").

Using "Forget About This Site" will remove all data stored in Firefox for this domain like history and cookies and passwords and exceptions and cache, so be cautious. If you have a password or other data for that domain that you do not want to lose then make sure to backup this data or make a note.

You can't recover from this 'forget' unless you have a backup of involved files.

If you revisit a 'forgotten' website then data for that website will be saved once again.