Opera's new 'Tab Islands' feature is very cool and I've wished for such a feature in FF.

Briefly, "When opening new tabs from a webpage, those tabs are automatically grouped together into an island."

https://blogs.opera.com/news/2023/06/opera-tab-islands/

I happen to be one of those bozo users with hundreds of tabs open all the time and I'm always interested in any feature, addon, plugin, whatever that would make it easier to keep my tabs organized.

Anyone know of such a feature in FF?