Edit: My last review was an error I made... I found out, that under specific circumstances the data either of Tree Stye Tab (-> TST) or Simple Tab Groups (-> STG) can become corrupt, which makes them behave "strange". I assume it was STG, which caused the issue, because when deleting a few big, but useless groups they shown further strange effects, which vanished after deleting them completely.
Forget my 3-Star-Rating, and my apologies!

Once you get used to you can't go back to using old style tabs. Althought it is not recommended to use this without the tab bar, after using it like that more then one year i can say it is a even better experience.

It's the best vertical taps plugin I had used.
I was use Microsoft Edge browser before, It has a good vertical web tab function but this one is more more powerful. It is more easy to use than Microsoft Edge's vertical tabs function, and have more good features to use than Microsoft Edge's vertical tabs function.
這是我用過最好的垂直網頁外掛。
我之前用的瀏覽器是Microsoft Edge，它雖然也有垂直網頁的功能，但是它做得並不是太好，在同時操作多個網頁時常常會有不少問題，但是這個外掛程式不僅沒有 Microsoft Edge 上述的問題，使用體驗也比 Microsoft Edge 好上不少，甚至功能還更多。

请给它增加一个快速打开关闭侧栏的快捷键，谢谢。

I literally swapped to firefox for this extension...