Researcher in the streets, sleepless in the sheets. Video games pay my mortgage.



  1. Go to about:config, accept the risks and continue.
  2. Search for "sidebar."
  3. Toggle sidebar.position_start between true (left, at least, for my current Firefox localization) and false (right)
    • You can toggle the sidebar (e.g. Bookmarks with Ctrl+B) and see the changes as you toggle the setting above.
    • Also works with other sidebar extensions like Sideberry.
Works as of Firefox v.119.0 (2023-11-07)

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