Sudden slow startup
Please see pictures in: http://forums.mozillazine.org/viewtopic.php?f=38&t=2811047
about:healthreport and about:startup are in that thread.
Wšě wotmołwy (3)
If your computer starts to run slow there is a great chance that your system has been infected with malicious threats or virus. For virus removal and Guide and to make your PC free from computer virus. See: <spam link removed>
Wot James
I really doubt it, safe mode boots instantly, but I am now writing this from a completely fresh Firefox installation and I have the same problem.
Plus, I have antivirus running, and I haven't "indulged" into any unsafe operations nor visited websites.
Wot 2metragluposti
Just reporting that turning off Hardware Acceleration speeds things up for some reason now, yet I've not installed any new drivers!