Why does Royal Mail no longer support Firefox as a browser?
Up until recently I have always used Firefox to access Royal Mail parcel sending service. This morning the browser tells me that Royal Mail no longer supports Firefox. Why?! I now have to use Google Chrome...!!
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Can you examine your user agent? I'm not sure if it's the reason, but there's something wrong with it. See How to reset the default user agent on Firefox.
https://support.mozilla.org/en-US/kb/how-reset-default-user-agent-firefox
Do you have enabled "Resist Fingerprinting" if you check ‘’’Resist Fingerprinting’’’
on the ‘’’about:config’’’ page as this affects the user agent?
- privacy.resistFingerprinting = false
- https://support.mozilla.org/en-US/kb/firefox-protection-against-fingerprinting
’’’Avast AntiTrack’’’ is also known to cause this issue.
You appear to have a user agent that is modified by Avast Anti-Track that could be causing problems, so if you do use this software then try to disable it. You will have to contact Avast about this if their software causes problems for you. We can't do much about this apart from identifying Avast Anti-Track as a possible cause.