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Twitter says Firefox is unsupported browser

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whenever I access Twitter with Firefox, it says "not the supported browser anymore." (though apparently Twitter includes Firefox as one of its supported browsers)

I've already updated Firefox to the latest version, but it doesn't work anyway.

Is there a way to fix this problem?

whenever I access Twitter with Firefox, it says "not the supported browser anymore." (though apparently Twitter includes Firefox as one of its supported browsers) I've already updated Firefox to the latest version, but it doesn't work anyway. Is there a way to fix this problem?
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I don't know what happens when you visit other sites, but on this site, your browser provided this self-identification (user agent string):

Mozilla/5.0 ComVoy (Windows NT 10.0; WOW64; rv:) Gecko/20100101 Firefox/

I wonder what ComVoy is?

For comparison, 64-bit Firefox 85 on Windows 10 usually describes itself this way:

Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:85.0) Gecko/20100101 Firefox/85.0

In case your user agent setting in Firefox has become corrupted, could you try the steps in this article and see whether they help:

How to reset the default user agent on Firefox