I agree, Firefon on my Sabayon is giving some pains. I usually use two browsers due to thinks not working. I use Konqueror as my general browser, because to me it's one of the most convenient programs I have been ever using. However, some video content on some news web pages do not work, so I use Firefox. But Firefox 18.104.22.168 can sometimes simply dissapear and then I cannot launch it. I check if I have any processes running, when none are there I start Firefox, I can see the hourglass running for about 20 seconds and then..... nothing. Not a single Firefox process. WHen I restart my linux I can again start Firefox.
Funny thing, I also used Firefox recently on my WIndows XP. I try to start it, but it pops up with a message that it is already running and asks me to shut it down first. I tried reinstalling it again to no avail. I think the Mozilla team is really messing around now. Since I don't specially like the way Opera works I think there is no good alternative, in fact, there is no real good browser now on Linux. I only know there are some new projects that might replace the Konqueror browser and give us a real good product.
I read Gentoo programmers are causing a bit of a mess too, but Mozilla...
Not to mention the Thunderbird mail client which I am very used to, now many features are disabled and I am beginning to be fed up with some of the software produced recently. Doesn't look good to me. I tried KMail, but then this one doesn't work with my mail boxes.
Skype is also another super program
(I only use it because of my friends), this one can really block your computer no matter whether it's WIndows or Linux. A pain in the a....