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Android: Tabs merging
(lemmy.world)
A place to discuss the news and latest developments on the open-source browser Firefox
Custom Collection https://support.mozilla.org/en-US/kb/how-use-collections-addonsmozillaorg
This works in Beta, Nightly, and all the forks (iirc).
Personally, I use the Mull fork of Firefox - wonder if it works for that as well. I don't feel a need to have 1:1 functionality on my phone and computer so I haven't gone down that path yet, but now this conversation has me pondering it.