Task Manager - see whether tabs or extensions are slowing down Firefox

Revision Information
  • Revision id: 174639
  • Created:
  • Creator: Joni
  • Comment: new article for 65
  • Reviewed: Yes
  • Reviewed:
  • Reviewed by: heyjoni
  • Is approved? Yes
  • Is current revision? No
  • Ready for localization: Yes
  • Readied for localization:
  • Readied for localization by: heyjoni
Revision Source
Revision Content
To use this new feature, please update Firefox if you don't have the latest version.

Firefox's Task Manager feature lets you see which tabs or extensions are using a lot of memory or energy. To see the Task Manager:

Open the Task Manager

  1. Click the menu button The image "fx57menu" does not exist..
  2. Click More.
  3. Click Task Manager. Task Manager will open in a new tab.
    task manager 65
Tip: You can also type in about:performance in the address bar to open the Task Manager page.

Actions within the Task Manager

Hovering over an item in the Task Manager will show more details about that that tab or extension's performance. It will also show an available action in the right column:

  • Tabs: Close tabs
  • Add-ons: Open the add-on page in a new tab.