First, Linux is a kernel, not an operating system. Second, nowadays web browsers are fairly big beasts, perhaps even more than the complex machinery that Linux

First, Linux is a kernel, not an operating system. Second, nowadays web browsers are fairly big beasts, perhaps even more than the complex machinery that Linux is. If lines of code are any measure Firefox and Chromium are above it[1][2][3]. Finally, Mozilla isn't making only Firefox. [1]: https://www.openhub.net/p/firefox/analyses/latest/languages_summary https://www.openhub.net/p/firefox/analyses/latest/languages_... [2]: https://www.openhub.net/p/chrome/analyses/latest/languages_summary https://www.openhub.net/p/chrome/analyses/latest/languages_s... [3]: https://www.openhub.net/p/linux/analyses/latest/languages_summary https://www.openhub.net/p/linux/analyses/latest/languages_su...