The web looks fine in standard supporting browsers, and as of now that is Gecko and Webkit browsers (which by the way make up 99% of OSS browsers, like Midori and IceCat). Most of the other non-Gecko/Webkit browsers are Trident based, closed source, and only support Windows.
Using the web is a bad example for showing that there is a "proprietary mindset", when in fact all the standards about the web are completely open.