When it comes time to dedupe, I’ll bookmark all open tabs (you can do this per window using ctrl+shift+d), open the bookmark manager and pull them from the per window folders into a single folder, then run an addon to dedupe my favorites. Much faster than trying to do anything like that by hand.
Once that’s done you can select all favorites in that folder and open them all up in a new window, but at that point I already have the bookmark manager open so I usually go through them from that.
When it comes time to dedupe, I’ll bookmark all open tabs (you can do this per window using ctrl+shift+d), open the bookmark manager and pull them from the per window folders into a single folder, then run an addon to dedupe my favorites. Much faster than trying to do anything like that by hand.
Once that’s done you can select all favorites in that folder and open them all up in a new window, but at that point I already have the bookmark manager open so I usually go through them from that.