I can confirm this in the recent release of Firefox 4. As Steve mentioned, it's easily reproducible simply by performing a Google Image search. This causes high CPU usage from the X server and on my computer at least, the display temporarily freezes.
I'm running Arch Linux, with an Nvidia 8200M (notebook) video card. If I can help by providing more information, please just ask. This has basically made Firefox unusable for me (so I'm posting from Chromium). -- You received this bug notification because you are a member of Ubuntu Bugs, which is a direct subscriber. https://bugs.launchpad.net/bugs/38131 Title: Firefox causes massive Xorg CPU usage -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs