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Mozilla released a Firefox Nightly test build with vertical tabs - gHacks Tech News
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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
Not sure what that means. But you have workspaces that contain various tabs and you can't access a workspace's tabs from another workspace. I have workspaces for recipes, videos, programming, and gaming.
Firefox Containers are walled off from each other. No settings, cookies, trackers, etc. are shared between one container group and another.