The possible cause might be using some browser extension that makes the request with Googlebot user agent.
Please make sure to disable all extensions (and remove that you are no longer using) and let me know so we could check on our end if that stopped?"

I'm getting locked out of a site I visit regularly. Their tech support sent me this reason: ‘Firefox browser (or some extension) is sending multiple requests to us with the browser User-agent "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"' This can't be happening from the normal usage, so we automatically block them because they are not the requests from genuine Googlebot crawler. The possible cause might be using some browser extension that makes the request with Googlebot user agent. Please make sure to disable all extensions (and remove that you are no longer using) and let me know so we could check on our end if that stopped?" How do I find what is doing this and how can I fix it? Steve Thomas