Its beautiful. It works really really well.
The most underrated extension in the category of sidebars.The possibilities are endless. I keep discovering new features everyday.

Tabs on the side; Containers; Bookmarks; So feature rich! I've removed the default tab bar and used this add-on to replace it completely.

The BEST tab manager, I always loved TST but it was lacking some features which I needed like tab grouping. I discovered this recently and it is extremely customizable even suspends tabs automatically. The perfect tab manager I've been looking for. Thanks for the developer for creating this extension. Will never leave Firefox because of extensions like TST and Sideberry alone.

I came back to firefox because of TST and Sidebery made sure I'll stick with firefox. It does everything I missed in TST and looks beautiful. Animations where kind of laggy for me but you can turn them off in settings, so problem solved. Awesome extension, love it <3

Absolutely amazing extension. So many options for customization..

I have been using vertical tabs extensions since they started making them. I think this is the best looking one and really customizable. Thank you.

The Perfect plugin!!! thank you

does everything piroor's tree style tab does (the core functions I used anyway) + it works with tab saver extensions without losing the tree hierarchy.

Great potential, very feature rich (love the remove cookies per container) and great customisability.

The only tab manager I have seen that can backup and restore trees with the tabs containers.

I have 2 major questions:

1. The snapshot is just brilliant as a backup, fast and so far accurate. (Almost Onetab with container support and trees! Can paste into excel! Needs the site icons though to help identify tabs) Is there any external save for the snapshots to transfer them between profiles?

2. While this is perfect for users who use containers as groups, I don't. I often need tabs from different containers grouped together in 1 group (which I use to separate tasks), so I can see what tabs I have and switch between them easily. For example, same site logged in under different logins, or FB, google and shopping site pages on the same topic. Is there any way to have groups view pane, with tabs from different containers in the same sidebar pane (in trees with tabs from other containers)? (Tree tabs vertical groups are brilliant, separately exportable-but sadly cannot backup with containers atm)

Go Dev!

This should be a recommendation from Firefox

I recently move from Vivaldi and this is what I was looking for on Firefox. Best extension I've ever installed, configuration page is also extremely friendly and useful. I wish I can vote twice.

First addon I've bothered creating an account and writing a review for because it is just that danged good.

I installed this addon for tab management, but I discovered it has many other features that make it stellar. (See below)

3 tips for those starting out:
- Click on the gear icon to see the million customization options.
- Enable the bookmarks section so you can go back and forth between your tabs and bookmarks in one section
- Double click on empty space below your tabs to create a new tab

## UI / Aesthetics
- Muted, minimalist, great for those using Dark themes (although you can change most of the colors, I really like the defaults)

## UX
- You do have to do things in the app the way it wants you to.
- Might not be as use friendly as it should be. Perhaps the developer can do more to make the app user friendly. When I installed the app for the first time, it didnt even have proper screenshots on the firefox addon page. These new screenshots will help a lot with new user onboarding.

## Tab managment
- Does everything I would want with a tab manager:
-- Grouping tabs
-- Nested tabs
-- group open / close
-- Etc etc (everything else a tab manager type extension does)
- What's missing:
-- Session management (I have yet to investigate the snapshot feature
-- Ability to rename your tabs
-- Ability to look at the tabs from other windows (Although you can move tabs between windows using the right click menu, so this isn't a huge minus)

## Bonuses
- Containers are nice! I have to use them more, but its like a way to have "environments" for your browsing
- Developer seems to actively maintain this addon. Keep on chugging! I hope this addon gets the attention it deserves!