seems like a onetab open source alternative

Love the addon. I've tried a lot of others and they were too buggy or unintuitive. This is simple and effective and doesn't use RAM. Love it. Cheers!

It has some issues yet, but has more features and already/{probably will be} more ergonomic than OneTab .

I really like this add-on. It isn't the slickest, but it is the most useful tabs add-on I've tried. I really like that it tracks changes to an active session. It is exactly what I've been looking for. Hope it catches on so the development continues.

This is a very good and helpful add-on,here's a five-star review so you keep good work going,Also I have a suggestion. I would like to see a feature that lets you drag any tab or tabs to a specific session.Although I know that you can add it by right-clicking and choose what session you want.It'll be awesome.Otherwise the add-on does what it should do and is very helpful,keep the good work!

Edit after developer response: I just noticed that if I want to add a single tab to a new session I can't,It has to be an already saved session,Can you add this option in the right-clicking menu when you right click a tab?,and also thanks for your response. If you can't add dragging tabs feature it's not a problem,But consider adding the option I wrote earlier in this edit if you can.Thanks!

It used to be good, now the "stored in a folder" thing made it a joke. I don't need an app to do that, it's just ridiculous.

Seriously, this is plain stupid, I hope an alternative pops up soon.

I just wish I could change keybinds or turn them off so I never accidentally hit them

This is a lifesaving extension -- it's transformed my approach to browsing. It's a little rough around the edges but generally very functional. An additional feature that would make a huge difference would be to have the ability to sort sessions you've set aside, either manually or automatically.