This depends on Tree Style Tab extension.

Currently this supports grouping of following cases:

* Tabs opened from external applications

Install

• License: Mozilla Public License 2.0
• Weekly downloads: 20
• Average daily users: 313
• Rating: 5/5 of 4 ratings
• Created: 2021-08-09 18:46:57
• Last updated: 2021-08-11 06:10:47
• Homepage: https://github.com/piroor/tst-auto-group-tabs/issues
• Support site and email
• Orig: https://addons.mozilla.org/en-US/firefox/addon/tst-auto-group-tabs/
• API: tst-auto-group-tabs@piro.sakura.ne.jp