Works flawlessly so far with the new WebExtensions. Only thing would be an option to secure it with a cloud like DropBox if any browser loss would occur And an option to sort the tabs by name, date, url would be practical. Otherwhise good one.

I'd really like it if clicking the button just added that tab to a one-tab list instead of adding all my unpinned tabs at once, or if I could choose this behaviour in the options menu.

The system of collecting all tabs I'm not currently using in a single tab is promising, hence four stars, but the current implementation where I send all tabs at once to OneTab isn't super useful to me.