The original announcement that Netscape would release Mozilla as open source included some FAQs, including one question along the lines of "are you going to release your own operating system?" The answer was that there was no good reason to build an operating system on a browser. If only they had remembered that!
> The answer was that there was no good reason to build an operating system on a browser. Because Chromebooks are such a failure right.
I might have seen around 5 total, on sale across European consumer stores, since they exist.