I really don't understand.
Why does copying (alt+D+enter) a subtab create a new parent tab instead of creating it at the same level?
Please don't update. It gets worse with every update.

2024. 05. 28.

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Problems in previous versions have been fixed.
Thank you for the quick feedback.
This add-on is one of the best add-ons for Firefox.

2024. 04. 20.

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This is a really bad update.
The previously intuitive drag/tree creation method has become truly confusing.

01. In the past, if I dragged a tab and put it inside, it created a new subtree, but now I have to drag it on top or bottoem of the tab to create a new subtree. (It’s different every time. What are the rules?)
02. In some cases I can create a subtree of tabs, but in other cases I cannot create a subtree of tabs. It becomes really sensitive when dragging.
03. It is not possible to create a new tree by dragging a child tab that does not have child tabs.

(There's more, but that's all I remember...)

What is the reason for this update??
Instead, it has become really, really confusing.
It would be nice to roll back. At first I thought there was something wrong with Firefox.

The usual tree style tab is 5 stars.
But I'm giving it 1 star because of this update.

2024. 04. 04.

If you have a particular mental issue like I do where you cannot help but open tabs upon tabs without closing prior tabs a lot of the time, then being too lazy to continuously scroll across horizontally to open up squished shortened tabs to see if you should close them, no matter how much coffee you've consumed and then closing the session for the next day, only to repeat the process contributing to your neverending tab collection, then this add on is for you.

I'm not exaggerating when I say this add on is a lifesaver and should be a feature on all browers by default, tabs are elegantly displayed and you can swiftly deduce what is important for further reading and what is unimportant and close them swiftly, trees also automatically form and categorize further if you've branched off from a particular tab, I've just closed 2000+ tabs I've procrastinated closing for approximately 1 month.

This extension is very convenient

That's the kind of things that once you use it well, you cannot imagine going back.

I wanted to use it to have Chrome convenient experience with tab groups (Chrome is better in that, but don't support multiple search engines and other cool functions), but I can use it only on desktop where I don't need tab group really much because I already have list of all tabs when browsing current tab, and can't on Android where I really needed it. Also realization of tab pinning and tab containers is not very convenient. And creating new tab button is (only) on bottom side of page which is not convenient too. Also I always forget about tabs tree and start using native top menu, and tab tree doesn't even (only icon like in chrome mobile groups maybe) copy there.
P.S. Also with 100+ tabs Firefox crashes several time a day, but I'm not sure that's just because tab tree

新機能の「タブを端に貼り付け」が非常に面白い。
気づいたらあったので、なんじゃこりゃ？と思って使ってみたら想像以上に斬新な機能で、思わずレビューを書きに来ました。

「タブをピン留め」機能は、必要なタブを常に手が届くところに置いておく点で便利です。
しかし、ピン留めした時点でツリー構造を失わせてしまうため、本アドオンとは実は相性が悪かった。

それが、「タブを端に貼り付け」だとツリー構造そのままに、指定したタブだけスクロールしても画面内に取り残されるようになります。
これにより、「必要なタブ」にアクセスするピン留め機能に対して、「必要なツリー」へとすぐさまアクセスできるようになり、いわばツリーの途中にしおりを挟むような感覚で扱えるようになります。
たとえば、ある記事から派生するタブをぽこぽこ開いておいて、ふと別のことを別ツリーで始めたりする際、根っこのところの記事のタブを「端に貼り付け」しておけば、元の記事の作業に戻ろうとする際に非常にスムーズにそれを見つけられるでしょう。

ツリーのインデントの深さを保ったままピン留めされるデザインも実に上手く考えられています。
意識せずとも「しおりの階層化」のような整理がなされるため、後から読み解いて探す際に非常に便利です。

大量のタブを開きっぱなしで扱う人間にとって、これは革新的な概念と言わざるを得ません。
それこそタブにツリー機能を持ち込んだ際の発想・発明に匹敵します。いや、脱帽しました。

ユーザーはぜひこの機能を使ってみるべきでしょう。

I am a coder who is working on a big web project, to organize all my tabs, this extension plays a very big role. I recommend this extension to everyone.

I think this is a great learning experience

I've been using this for so long. Since I heard it announced on Security Now podcast probably over 10 years ago. I can't imagine a world without it. I can't use any other browsers since they don't have it.

Well made and more usefull than you might think before :)

great addon !
keep going ;)