Works very well! I find that I can re-access my tab groups when I exit my Firefox window and reopen it. Pretty good for something that has not been updated in more than two years!

注意点として
・グループはウィンドウやタブとは別の枠組み(隠しタブを使ってる)として扱われる。
・新しいグループはそれを作成したときに操作してたウィンドウに隠しタブとして追加される。
・グループを扱ってたウィンドウを閉じてもグループは削除されない

複数のウィンドウを開く自分には結構とっつきにくい仕様、ウィンドウ単位でグループ扱えたらわかりやすかったかな……

隠しタブでなく別のウィンドウとして扱いたい場合は
1.「グループの管理」または「ストアのスクリーンショット4枚目」みたいに右クリック
2.「グループを新しいウィンドウで開く」
これで新しくて作ったグループを別のウィンドウで開けた

これとは別の話だけどグループ設定から「このグループにタブが自動的に移動した場合そのタブを表示する」を有効にすると移動したウィンドウがアクティブになって使いやすい

とても使いやすい
日本語にも対応しています

the best tool to group tabs

I have used this add-on for years and love it! Recently (I think since Firefox update 132.0.1) all the tabs keep deleting whenever the last tab of a group is closed. I hope this gets fixed, but for now there is a temporary workaround:
In about:config you can set `browser.tabs.closeWindowWithLastTab` to `false`. (There is a better explanation on the github-issues page, under issue #1229 but I can't paste URLs here.)

I can not express how useful this add-on has been to me. It is phenomenal to be able to group tabs according to what I'm working on and to swap between groups as needed. It's great for pausing a project and returning to it later.

So very, very good. I keep wanting to recommend it to friends who have 100 tabs open, but most are running chrome and it doesn't seem to have a similar add-on. Their loss!

Thank you Drive 4ik

Just what I was looking for :)

I found this to be the most intuitive for tab storage and management. No need to "stash" them or "bookmark" or "manage sessions". Tabs are just saved automatically in a group. You can have hundred of groups with a different name and switch between them with a click.

Assigning icon (emoji) to a group would be great. I know it's possible but not simple. First emoji in the group name should be auto assigned as the icon.

Good

I use Firefox because this add-on exists. It is such a valuable add-on.
Report a small bug. If you duplicate a tab by middle-clicking the reload button in Firefox, a new tab group will be created automatically the next time Firefox starts.