Allow Firefox to load multiple tabs in the background

Revision Information
  • Revision id: 124438
  • Created:
  • Creator: Joni
  • Comment: new article per bug 1260460
  • Reviewed: Yes
  • Reviewed:
  • Reviewed by: heyjoni
  • Is approved? Yes
  • Is current revision? No
  • Ready for localization: No
Revision Source
Revision Content
This applies to versions 47 and up on experimental versions of Firefox with multiprocess support only.

If you're using Firefox with multiprocess support (E10S), Firefox will wait until you select a tab before loading it. This keeps Firefox running quickly and smoothly.

If you've allowed an earlier version of Firefox to simultaneously load multiple tabs in the background, when you upgrade to version 47 and up, your setting will reset to allow only one tab at a time.

You can change it back through your about:config preferences (advanced users only):

  1. Type about:config in the address bar and press EnterReturn.
    A warning page may appear. Click Accept the Risk and Continue to go to the about:config page.
  2. Search for browser.sessionstore.restore_on_demand.
  3. Change the value to false.
  4. Close the about:config tab to save your changes.
Allowing Firefox to load tabs simultaneously when you have multiprocess support can slow down its performance.