Firefox and Chrome can. But lots of people use the system's browser, just because they don't know how to install their own browser. Also you have to consider th

Firefox and Chrome can. But lots of people use the system's browser, just because they don't know how to install their own browser. Also you have to consider that there are devices out there that include a browser, but no way to install your own software. Gaming consoles, phones, TVs etc. with included browsers, many of them with outdated technologies and with no way to update or install your own software.