I'm thankful for Firefox as well. I used to use it all the time. Then it started to break. The newer releases were slower than the previous releases. Websites simply wouldn't work, like Facebook, which used to work the best on Firefox.
I think the world is ready again for a browser that you actually have to pay for. That is, as long as it is worth paying for. The old saying applies to Firefox, sadly. Firefox is free, and you get what you pay for.