After being on for an hour FF starts using up to 1.6 GB of CPU

This has been going on for a long time, but it is really annoying. I have to restart firefox all the time. If I don't it will just crash. The cpu use goes up to 1.6 GB and in general having more then 2 tabs makes it really slow [even with low cpu usage 200-300 MB].
Yes, I have read all the help topics and done what I could [few months ago], but if else things are getting worst. I really can't use it for all the things I need it and there is always a chance if me loosing any messages I'm writing due to the crashing problem.
Any help would be appreciated
Thank you
crdf
P.S. When log-in to post this topic would be nice if after entering a wrong password the log-in (not the register window) window stayed open.
Recently my FF crashed and all info was lost. I had to create a new profile and substitute the information from the old one to the new one. Opening the old profile didn't work. I did not press any shortcuts, FF simply crashed. That's fixed now but I'm just notifying you.

Hello,
'''Try Firefox Safe Mode''' to see if the problem goes away. Safe Mode is a troubleshooting mode, which disables most add-ons.
''(If you're not using it, switch to the Default theme.)''
* On Windows you can open Firefox 4.0+ in Safe Mode by holding the '''Shift''' key when you open the Firefox desktop or Start menu shortcut.
* On Mac you can open Firefox 4.0+ in Safe Mode by holding the '''option''' key while starting Firefox.
* On Linux you can open Firefox 4.0+ in Safe Mode by quitting Firefox and then going to your Terminal and running: firefox -safe-mode (you may need to specify the Firefox installation path e.g. /usr/lib/firefox)
* Or open the Help menu and click on the '''Restart with Add-ons Disabled...''' menu item while Firefox is running.
[[Image:FirefoxSafeMode|width=520]]
''Once you get the pop-up, just select "'Start in Safe Mode"''
[[Image:Safe Mode Fx 15 - Win]]
'''''If the issue is not present in Firefox Safe Mode''''', your problem is probably caused by an extension, and you need to figure out which one. Please follow the [[Troubleshooting extensions and themes]] article for that.
''To exit the Firefox Safe Mode, just close Firefox and wait a few seconds before opening Firefox for normal use again.''
''When you figure out what's causing your issues, please let us know. It might help other users who have the same problem.''
Thank you.

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