I just had a stupid moment and upgraded from Firefox 22 to 30 yesterday. I know every version adds problems and removes features, but I wanted check what is the current status. Now, Firefox 30 freezes flash games for some seconds every some minutes. Of course, with the 22 this never happened. The computer is identical, only Firefox is changed. Considering the level of the answers here, I in advance say: * no there are no viruses or malwares - I said only Firefox is changed * yes I cleared cache cookies and other stuff people say when they do not know what else to say * yes flash is the same version * I have no theme and the addons are the same of the old version * I could care less about safe mode. The old version never saw safe mode and it worked fine Maybe there is some stupid about config setting for which Firefox want an useless disk access? something new in the version 30 I mean. Maybe version 30 is become so inefficient that when it updates the cache it freezes totally? I have last faint hope for some real practical suggestion, for which I thank in advance. With FF 22 I could play flash games for hours without problems, with v 30 I need to close it every hour otherwise it takes so much RAM (up to 2 GB) it totally hangs. But hey they removed the download window, they say "use an addon". When the RAM is totally out, they say "you have too many addons". Wonder why. Next time we will need an addon for supporting images?