tl;dr

> However, to enable this impressive breakthrough in online technology, web browsers (currently Chrome and Firefox) have had to expose low level parts of their operating systems which previously could not be directly accessed by potentially malicious web pages, thus creating a number of potential security vulnerabilities.

your post is FUD. that issus was solved immediately and the actually bug listed had nothing special to do with graphics and is just a bug like a bug in javascripy or the browser in general. a bug that was fixed. If you're going to off WebGL based on that bug then you'd better turn off your entire browser