I can confirm that in 89.0.1, gfx.e10s.font-list.shared is set to false and the bug does not appear. When I set it to true again, it appears.
** Changed in: firefox (Ubuntu) Status: Incomplete => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1930700 Title: Firefox 89 won't load pages due to many fonts To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1930700/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs