Everyone who's complaining of the "flash thing", I'm not sure WHICH you mean - that if you download Firefox, it's unbelievably slow loading Flash, or that you can't view certain websites because of it's flash.
Both of these prolems can be fixed. If it's slow, I suggest downloading an older version of Flash, which I did, now it takes no time to load chats, oekakis, whatever.
For the second one, if you were to view a website such as the MapleStory one [the only one I can think of with a problem right now], it would say you need IE. This, however, isn't true. Go to tools and options and disable java and you can use the site just as easily.
Also, yea, it's a LOT faster than IE, lets me tab stuff, and the bookmark eating thing actually happens by Firefox trying to protect you. If your computer gets an error or something, immediatly restart, and you should have all of your bookmarks. If you don't, and it closes and you reopen Firefox an they're gone, it switched to default or another user, and if you can find out how to switch back [I have yet to, but whatever], then al lyour bookmarks will be there.