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Mozilla Firefox is Working on a Tab Grouping Feature
(news.itsfoss.com)
A place to discuss the news and latest developments on the open-source browser Firefox
Oh that's pretty neat Is there a way to make panorama view not hide tabs ?
I use Tile Tabs WE for something similar
https://addons.mozilla.org/en-CA/firefox/addon/tile-tabs-we/
Took a while to get the hang of it, creating layouts and such