
As a chronic die hard multiple tabs opener, Onetab litteraly made my browser usage livable. It saved me several times, having hundreds and hundreds of tabs open and can't be simply closed. I use it daily.
It just works—does what it says it will do without any unnecessary EXTRA. I dig it.
I've been using OneTab for more than 4 years. This makes my all experiences on Firefox and Chrome much easier.
OneTab allows me to continue hoarding tabs, but also make sure they aren't causing my browser to come to a standstill or get over-cluttered. When I send a group of tabs to OneTab, I try to make sure they represent a project or task I'm trying to accomplish instead of just blasting everything away. This makes it really easy to pick up a project if it comes back to the forefront of my tasks. Otherwise, if it ages there too long, I just get rid of the whole group.
Essential if you switch between multiple work contexts. Saving Chrome memory usage doesn't hurt, too!
The best tool when in a startup wearing 15 hats. You can have "tabs" of multiple websites related to focused topics all saved.