443
Mozilla released a Firefox Nightly test build with vertical tabs - gHacks Tech News
(www.ghacks.net)
From Wikipedia, the free encyclopedia
Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
Community icon by Alpár-Etele Méder, licensed under CC BY 3.0
I used to use Chrome at work. When Edge added vertical tabs I jumped to that immediately.
Now that IT is allowing FireFox I switched to that with Tree Style Tabs. I am missing the tab groups from Edge, but the tree is worth it.
Yes tree tabs with groups would indeed be perfect.
Sidebery has tab groups and natively supports containers, which is perfect for your use-case. Might as well be TST 2.0.