I'm tired of sites stealing my keys. Almost every other browser has add-ons that you can use to forbid sites from remapping arrow keys, shortcuts, mouse keys or any key at all, but I can't find such a solution for Firefox. I've been using Firefox since its beginning and I love it, but sites are getting more and more aggressive and if FF doesn't respond soon, I'd definitely save the nerves and use something else! Thank you.

P.S. Don't offer me disabling my JS please :) That's not a solution, that's an excuse!