Firefox was working fine last night. I remember that it popped up saying it had updated. This morning I go to run it, and it crashes immediately. Try again, same thing. Try to run it in safe mode - Same thing. So I put it through the error checker, and it spit out this: Signature js_InflateString UUID b5206a58-47a4-417d-acaf-982b52100625 Time 2010-06-25 08:56:33.707154 Uptime 5 Last Crash 98 seconds before submission Install Age 132 seconds since version was first installed. Product Firefox Version 3.6.4 Build ID 20100611143157 Branch 1.9.2 OS Windows NT OS Version 5.1.2600 Service Pack 2 CPU x86 CPU Info GenuineIntel family 6 model 9 stepping 5 Crash Reason EXCEPTION_IN_PAGE_ERROR Crash Address 0x356840 User Comments update was installed, firefox crashes on start now Processor Notes WARNING: Json file missing Add-ons EMCheckCompatibility False Crashing Thread Frame Module Signature [Expand] Source 0 js3250.dll js_InflateString js/src/jsstr.cpp:3473 1 js3250.dll JS_CompileScriptForPrincipals js/src/jsapi.cpp:4585 2 xul.dll mozJSComponentLoader::GlobalForLocation js/src/xpconnect/loader/mozJSComponentLoader.cpp:1294 3 xul.dll mozJSComponentLoader::LoadModule js/src/xpconnect/loader/mozJSComponentLoader.cpp:695 4 xul.dll nsComponentManagerImpl::AutoRegisterComponent xpcom/components/nsComponentManager.cpp:3131 5 xul.dll nsLocalFile::IsDirectory xpcom/io/nsLocalFileWin.cpp:2457 6 @0x1e369ff Of course I can't make sense of this, so I'm hoping someone here can. How can I rollback to the version I was running until today? == Operating system == Windows XP Home SP2