This [https://support.mozilla.org/en-US/kb/view-synced-tabs-other-devices#firefox:mac:fx94 "half-answer"] summarizes my frustration. FWIW, both computers are late-model MacBook Pro - call them Mac1 and Mac2. Both have Sync set up. I have about 40 tabs open in 3 FF windows on Mac1. I need to open all 40 tabs (which can all be in one window if that's easier) on Mac2. On Mac 2, I can see the list of open tabs from Mac1 when I click the account name (after clicking the "hamburger patties"). If I click on one of them, that tab is opened on the current tab... terrific - BUT, I don't want to repeat this 40 times!! Is there no way to select ALL tabs, or export all open tabs to a file - or something that makes a little more sense than repeating a task 40 times?