I'm a person who opens up many many tabs, at the end of the day I see that I didn't have time to go through all of them and I have to either bookmark or crash Firefox so that it restores it for me the next time I boot into my computer; however those options are either time-consuming or unreliable.

OneTab is the perfect plugin for me, I hope they keep this plugin on Firefox forever.
I save all my tabs with one-click, very easy and useful, then they are conveniently and neatly sorted into groups, based on when you saved those tabs, you can also arrange them into groups and name them, you can restore tabs individually or all at once, also you can export/import the tabs that you saved.

It's everything I've ever wanted for such a plugin, great job and thanks to: the OneTab Team, the developers, and all those people that made this possible.