This bug also affects me. I use Arch Linux and the bug started manifesting itself after I installed a new NVIDIA GPU (GeForce GTX 650, driver version 304.51). I used integrated Intel GPU (Intel HD Graphics 2000 in a Sandy Bridge CPU) before and the problem was not present.
"opacity: .99" can be set permanently for the body element of all visited web pages by editing $HOME/.mozilla/firefox/[profile-directory]/chrome/userContent.css so that it contains: body { opacity: .99 ! important; } This is a usable workaround, it doesn't seem to affect rendering of web pages aside from removing the bolding issue. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1015751 Title: Text is randomly rendered bold when scrolling To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1015751/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs