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Website no longer supporting FIrefox access

  • 5 replies
  • 1 has this problem
  • 36 views
  • Last reply by cor-el

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Firefox update (about 4 weeks ago?) resulted in losing access to various accounts eg: bank, health care provider. Forced to use Chrome (blech!) Websites now state that I'm using an "unsupported browser". Have contacted host sites and they are unresponsive and/or unable to provide solution. Can still access bank etc from Android phone but forced to use other browsers from MacBook Pro.

Thank you for your assistance!

All Replies (5)

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Websites say that Firefox is outdated or incompatible even though it's the latest version

https://support.mozilla.org/en-US/kb/how-reset-default-user-agent-firefox

You can check out at the browserspy website how websites see you:

http://browserspy.dk/browser.php
http://browserspy.dk/headers.php
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You are on Mac OS X 10.11 and this platform is no longer supported, so Firefox 78 ESR is the last version you can use. It is possible that websites no longer support this Firefox version and in that case you are out of luck. Can't you update to a more recent Mac OS X version.


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Thanks for the response. Answers question but doesn't solve my problem. Unfortunately my MacBook Pro is from 2011 and can't support newer OS. I'm going to try to revert to an older version of Firefox since it was all working until a few weeks ago and until I can afford a new computer. PS You should hear the fan on this laptop, sounds like a jet engine revving...keep having to take it apart and clean it BUT its still running:)

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Note: Some versions of Quantum change how the data files are set up, so they may not be backward compatible.


Install Older Version Of Firefox {web link} Be sure to read everything here.

If you still want to downgrade, look under; I still want to downgrade. Click the Directory of other versions and languages link. Look for the directory of the version that you want. But, remember that old versions may have security issues.

You should also check out Firefox; Extended Support Release {web link} ESR Notes System Requirements

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Try to do a clean reinstall and drag the current Firefox application to the trash.

Firefox 78.8.0 ESR:

You can create a new profile as a quick test to see if your current profile is causing the problem.

See "Creating a profile":

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 problems.