Today I upgraded Ubuntu from 12.04 to 12.10 and memory usage of Firefox increased from around 150 MB in 12.04 to 350 MB in 12.10.
Is there a way to fix this?
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Fiefox has a small memory leakage problem
To fix it [Try This]
Open Firefox and go to the Address Bar. Type in
about:config and then press Enter.
Right Click in the page and select New -> Boolean.
In the box that pops up enter
config.trim_on_minimize. Press Enter.
Now select True and then press Enter.
Hope this will help