User-Agent: Opera/9.80 (X11; Linux i686; U; en) Presto/2.2.15 Version/10.10 Build Identifier: 3.5.5 Opera runs fine. Fx is slow. See attached backtrace. Reproducible: Always Fx will run half ok for a few minutes then stop loading all pages.
Have you tried: - Firefox's safe-mode to exclude extension/theme problems - a new profile - a clean reinstallation http://support.mozilla.com/en-US/kb/Safe+Mode http://support.mozilla.com/en-US/kb/Basic+Troubleshooting#Make_a_new_profile
Anyone looking for changeset 0220a693177e or d25bb34f4cce go to bug 533956...
Closing. My network was not set correctly. Details here: http://sites.google.com/site/morefedora12/the-importance-of-system-config-network Thanks to all for their patience and help.