Firefox sends many requests?

There seems to be a Problem with Firefox on Youtube, when i try to watch a video, the site show me a captcher saying the site received many requests from my Network, then I have to fill a captcher to be recognized not as robot. On some days it works, and sometimes not.

I already tried another Browser "Edge", and it works fine there. I tried also to disable the add-ons on firefox and does not work. But I noticed when I'm logged in with an account(email) on youtube, it works without the captcher.

I tried to use the Network analyzer tool within Firefox, but how to read thru the lines, or should be instead used antoher extern tool ?

Thanks

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