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Today I Learned : Firefox - Which tab is using my CPU?
Feb 8, 2019
One minute read

Navigate to about:performance url. This will bring up the task manager for Firefox.

Firefox Task Manager displays the following information:

  • Name of the item
  • Type (tab/addon)
  • Energy Impact (roughly equivalent to load on CPU)
  • Memory Impact

Here is a screenshot showing this page.

Firefox Task Manager



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