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Ok, on Windows 7 64 bit, I basically use Firefox to browse the web, with a DSL broadband connection.
Sometimes while surfing, I see the computer slows to a crawl for a few minutes and then goes all right again. At this time the Task Manager shows 98% memory usage with 3.9 GB being used out of 4 GB ram.

Today when this happened, I ended the Firefox process, and the usage instantly reverted back to normal 600 MB.
So whats happening?

This is the paste of the firefox memory dump: @magicandre1981

Update: The problem may not be Firefox. Here is a picture of what is happening:

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Have you tried disabling add-ons? Please mention which version of firefox you are using, and also the add-ons. – VenkatH Dec 24 '12 at 19:09
@VenkatH Firefox 17.0.1 Addons: Adblock, Abduction, AVG plugin, Nitro PDF plugin, Shockwave plugin – Spandan Chatterjee Dec 24 '12 at 19:18
Remove AVG, install MSE and see if that fixes it. – Karan Dec 24 '12 at 20:57
inside Firefox visit about:memory ,copy the output to and post a link here. – magicandre1981 Dec 24 '12 at 22:26
@Karan you think AVG is a problem? Now that you say, from time to time, AVG displays warning that firefox using too much memory.... <br>you think its related? – Spandan Chatterjee Dec 25 '12 at 3:31

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