It's Nov, 2021, and all of the answers here are a bit old. I just struggled through this, and thought I'd share what I learned:
Preliminaries:
Make sure you've got your "Settings" for Sync
correctly set up - in this case that Open Tabs
are enabled, and you're properly signed in to the same account on both/all computers.
Firefox has a native Sidebar Button
. If it's not installed on the "Target computer" (explained below), follow this procedure to install it in Firefox.
I'll call the two computers involved the "Source computer", and the "Target computer". The computer that currently has the open tabs is the "Source computer"; the computer that is to receive the tabs is the "Target computer".
Instantly Opening Sync'd Tabs on "Target" Computer:
Click the Sidebar Button
on the "Target" to show the Sidebar in the active FF Window. It can be clicked again to hide the Sidebar.
At the top of the Sidebar, click the drop-down, and select Synced Tabs
. This will reveal a list of potential "Source" computers & devices, and beneath each a list of Synced Tabs on that Target. From this point you have several options, most of which will be obvious on inspection:
- You can right-click individual tabs in the "Source" listing in the Sidebar to open it on your "Target" computer,
- you can search the tabs listed in the Sidebar, and
Select All
tabs for opening on the target computer, or
- you can select a computer/device in the Sidebar list (perhaps with many open tabs), right-click that computer, and choose the
Open All In Tabs
item in the menu to open all tabs on the "Source" computer in the "Target" computer.
Any feedback is appreciated as it's possible I've failed to cover a step - perhaps due to settings made previously.