Firefox takes for ever to start(Ubuntu 9.10)

[Sascha]

Binary package hint: firefox-3.5

& sometimes doesn't even starts.
My Ubuntu is useless if I cannot browse the web.
Not even IE is so terrible.

ProblemType: Bug
Architecture: i386
Date: Tue Apr 27 23:44:44 2010
DistroRelease: Ubuntu 9.10
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
Package: firefox-3.5 3.5.9+nobinonly-0ubuntu0.9.10.1
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-20.58-generic-pae
SourcePackage: firefox-3.5
Uname: Linux 2.6.31-20-generic-pae i686
XsessionErrors:
 (gnome-settings-daemon:2380): GLib-CRITICAL **: g_propagate_error: assertion `src != NULL' failed
 (gnome-settings-daemon:2380): GLib-CRITICAL **: g_propagate_error: assertion `src != NULL' failed
 (firefox:2414): GLib-WARNING **: g_set_prgname() called multiple times
 (nautilus:2412): Eel-CRITICAL **: eel_preferences_get_boolean: assertion `preferences_is_initialized ()' failed
 (polkit-gnome-authentication-agent-1:2431): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed