Firefox 81.0 available in Mozilla website
Steps to Reproduce:
1. Go to https://www.mozilla.com/firefox
2. Try to download Firefox
3. The downloaded version is 81.0
Firefox 81.0 not in Gentoo portage
Firefox 81.0 available in Gentoo Portage
Please see https://wiki.gentoo.org/wiki/Zero-day_bump_requests.
I can be sure that the maintainer is already aware and is working on it. There are some bigger changes going on with the eclasses which ideally would be timed with it.
*** This bug has been marked as a duplicate of bug 744208 ***