I had the same issue recently almost every site triggered the Cloudflare “are you human?” check in Firefox Android, even when the VPN was off. It turns out Firefox Sync (when logged in) sometimes keeps older browsing data or cookies that Cloudflare flags as suspicious.

What worked for me:

Go to Settings → Delete browsing data → select Cookies and Site Data + Cached images/files, then clear them.

Sign out of Firefox Sync, close the app, and reopen it.

Log back into your account, but don’t restore tabs right away just open a few new ones and test.

After that, the Cloudflare challenges stopped showing up for me. Seems like something in the synced session cookies triggers Cloudflare’s bot protection. Hopefully Mozilla patches this soon, but this workaround helps in the meantime.

Hi mikedeissler,

Could you please update the thread to indicate whether the suggested solution from Lucas above help resolved your issue? If it worked, you can also directly mark the reply as the solution to help other users with similar problem discover the resolution.

If you're still experiencing problems, please share any additional details so we can continue assisting you. Thanks!

Hi mikedeissler, Could you please update the thread to indicate whether the suggested solution from Lucas above help resolved your issue? If it worked, you can also directly mark the reply as the solution to help other users with similar problem discover the resolution. If you're still experiencing problems, please share any additional details so we can continue assisting you. Thanks!

Kiki, I wantedvto reply to your message that my issue was not solved. But when I kicked the "view message" link it was automatically marked as solved and I can't figure out how to change it. The problem is not solved and still persists.

Kiki, found tge "undo solution" button.... sorry for the trouble.

@Mike,

Thanks for your update. In that case, you may want to check out the following thread: /questions/1442767 and see if it helps you.