I've been using Session Buddy [1] to "lasso" a set of my open tabs for later use. A little bit more love to that UX and it'd be bliss. I worry about Tabvention automatically closing my tabs.
I'm using it, too, but it should find a way to eliminate dupes. Also, all these tools lose the history, i.e. if you reopen a tab, you can't go back, which I understand, but would wish there was a way to store at least few hops back.
[1] https://chrome.google.com/webstore/detail/session-buddy/edac...