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Mozilla released a Firefox Nightly test build with vertical tabs - gHacks Tech News
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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.
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Exactly. The monitors are wide, but websites usually are not. They are made with smartphones in mind which are of course vertical. So you either have dead space on websites or on sites that do scale (like this one right here), I'd actually prefer it to be more compact, since I find it more comfortable to read comments that are less wide.