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Browser issue(s)

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A few web sites I've ordered from for many years have been getting annoyingly buggy, to the point where I've had to resort to phone or chat to get the order through. Issues have included not accepting the security code on a credit card, changing the order or price when it shows in the cart, suddenly disappearing the payment page... Etc. Some of this is (I think) just recent silly software changes (maybe). When I ask what the problem is, customer service rep asks what browser I use; when I say Firefox, they indicate they're optimized for/more familiar with Edge or Chrome. Is this something other users are running into? Can't believe it's just me.....Guessing you might be able to get some hints from what's below?

Thanks......

A few web sites I've ordered from for many years have been getting annoyingly buggy, to the point where I've had to resort to phone or chat to get the order through. Issues have included not accepting the security code on a credit card, changing the order or price when it shows in the cart, suddenly disappearing the payment page... Etc. Some of this is (I think) just recent silly software changes (maybe). When I ask what the problem is, customer service rep asks what browser I use; when I say Firefox, they indicate they're optimized for/more familiar with Edge or Chrome. Is this something other users are running into? Can't believe it's just me.....Guessing you might be able to get some hints from what's below? Thanks......

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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You can reload webpage(s) and bypass the cache to refresh possibly outdated or corrupted files.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), click the padlock icon (Clear cookies and site data) for the domain in the selected tab.

"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 if userChrome.css/userContent.css is causing the problem.

  • switch to the Default System 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 check for issues with Enhanced Tracking Protection. 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 like blocked content.


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 careful. If you have a password or other data for that domain that you do not want to lose, 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, data for that website will be saved once again.

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