Firefox: Sync Toolbar Layout

https://support.mozilla.org/en-US/questions/1292568

Tips&Tricks

Firefox can be made to synchronize the toolbar among multiple instances. The configuration is stored in browser.uiCustomization.state which must be added to the sync keys.

  1. Open about:config page in Firefox and bypass the warning (if you see one).
  2. Then type services.sync.prefs.sync.browser.uiCustomization.state into the search bar on that page.
  3. Create a new preference. Select Boolean, press the + button, and ensure the value is set to true.