Firefox – Apparent leak in Mozilla Firefox


Possible Duplicate:
How to Determine which Firefox Add-ons are Using the Most Memory

I use Mozilla Firefox 3.6 all day, opening and closing tabs quite regularly. I am noticing over time that the firefox.exe process size keeps growing and growing over time.

Initially I put this down to memory fragmentation caused by opening and closing tabs, but now I am suspecting that there is a memory leak in one of the add-ons that I have installed.

The problem I am seeing is that when the process size gets to about 1.5GB in the "Mem Usage" stat in Task Manager (and it gets there quite regularly), Firefox freezes up.

These are the add-ons I currently have installed:

  • Adblock Plus (1.1.3)
  • English (Australian) dictionary (2.1.1)
  • Gmail Notifier (
  • Google Reader Watcher (
  • Java Console (6.0.11)
  • Java Console (6.0.07) (Not sure why I have 2 versions of this)
  • Java Quick Starter (1.0)
  • Session Manager (

Are there any known memory leak issues with any of these?

Could something else by causing this problem?

Best Answer

I had similar symptoms, so I started disabling addons at random. Eventually, the bloating stopped (I believe it was After The Deadline, but I could be wrong.)

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