Happens to me with firefox 1.0.8-0ubuntu5.10 in Breezy. Whenever the network connection is slow, for example when I am also downloading files in the background, firefox wil use 100% cpu and be unresponsive until all new windows/tabs have loaded, which can take minutes.
Clearly a busy-waiting programming error. -- firefox hangs when it loads a page in the background https://launchpad.net/bugs/20765 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
