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Mozilla Firefox is Working on a Tab Grouping Feature
(news.itsfoss.com)
This is a most excellent place for technology news and articles.
Vivaldi has tab hibernation so that the extra tabs barely take any resources unless you open them.
I use over 100 tabs. Basically serves as an always changing bookmarks. Those tabs are also split across multiple workgroups between which I can switch easily with a flick of my mouse.