cache validation preferences and browsing via history. r=gagan,gordon. Fixes several bugs that I would mention here if bugzilla weren't down ;-) git-svn-id: svn://10.0.0.236/trunk@92271 18797224-902f-48f8-a5cc-f745e15eee43
cache validation preferences and browsing via history. r=gagan,gordon. Fixes several bugs that I would mention here if bugzilla weren't down ;-) git-svn-id: svn://10.0.0.236/trunk@92271 18797224-902f-48f8-a5cc-f745e15eee43