A couple days ago I noticed that websites aren't able to determine which browser (or version) I'm using. For example, I went to Google's WhatBrowser.com, to see how it recognized my browser. The result? "You are using: Sorry, we couldn’t recognize your browser. The What Browser team has been notified." I saw this old question ([https://support.mozilla.com/en-US/questions/881804?s=sites+can%27t+recognize+browser&r=4&as=s old question]) from the Firefox support forums, and so I did what one user suggested. I went to "about:config", filtered for "general.useragent" and I reset the line that had been changed by one of my extensions. Still, the problem persists. '''What can I do?''' short of uninstalling and reinstalling?