https://support.mozilla.org/en-US/kb/customize-firefox-home-screen#w_customize-firefox-home I believe this info is relevant, but this undated page may be out of date (I am on Windows 10 with 94.0.2 ) -- I do not see the things they refer to: "Tap the menu button:" which has a URL, a "1" in a box, and a three-vertical-dots array in a red box. Clicking upper-right-corner icons at random has "disconnected" my account. Just getting in deeper. I bet I have to log in again...