Definitely the most flexible extension at the moment!

The developers have created an incredible combine in terms of functionality!

Great app, so many configuration settings for customization; although unfortunately seems like not update for a year already.

Excellent and highly customizable plugin! I read that the version 5 (right now in beta) will have tab search as well. Can't wait for this! Thank you for this great plugin!

Edit after v.5 release: Just WOW!

Just amazing! Very clean and lots and easy configurations.

Great stuff, won't go back to regular tabs.

created acc just to thank the developer for changing my life

This + hiding the tabs toolbar by adding userChrome.css is the best browsing experience :thumbsup:

can't live without this, those features should be in every browser, I don't want to go back to normal tabs anymore.

Sidebary v5 from (https://githu.boo/mbnuqw/sidebery/releases) is better.

This is an amazing sidebar hierarchical tab extension for Firefox. Saves a lot of time and allows you to keep regularly visited sites and related sites and pages together. Multiple panels of tabs, pinned tabs, the features go on and on. Few other options are even close. Nothing on Chrome is anywhere near as functional.

Fantastic tab management