It lets you put tabs into groups. The groups are really just a collection of links. I've found it useful for not having tons of tabs open. If you have tabs open for a long time you want to get to eventually, simply dump them into OneTab. In practice, I've found that most of the links I dump into OneTab never get read. Which turned out to be quite alright for me - I've wasted enough of my life browsing the web. I now aim to dump all open tabs into OneTab at the end of each day, so I start the new day with a clean slate. If there was any important link, it's always still there in OneTab should I want to access it.
It lets you put tabs into groups. The groups are really just a collection of links. I've found it useful for not having tons of tabs open. If you have tabs open for a long time you want to get to eventually, simply dump them into OneTab. In practice, I've found that most of the links I dump into OneTab never get read. Which turned out to be quite alright for me - I've wasted enough of my life browsing the web. I now aim to dump all open tabs into OneTab at the end of each day, so I start the new day with a clean slate. If there was any important link, it's always still there in OneTab should I want to access it.
It is not open source. Someone seems to have made an open source equivalent (have not tried it): https://addons.mozilla.org/en-US/firefox/addon/better-onetab...