[citation][nom]otacon72[/nom]Firefox has been garbage since v4. I can't even play one youtube video without it crashing because of flash and don't blame Adobe. I can have 10 tabs open in IE9 all playing youtube videos without any issue at all. Maybe they should test more instead of releasing a new major update every other week.[/citation]
Probably a misconfiguration in your system. Firefox has only ever crashed twice on me since 14 (use 15.0.1 now). Most of what I do is email, facebook, YouTube, live streams, Amazon Prime Instant Video, and tech forums. I (reluctantly) make extensive use of Flash with well over 30 tabs open simultaneously without issue. IE9 lags like crazy when you put that kind of stress on it.