Unfortunately they've been stupid and blurred the lines between Firefox the browser and Firefox the "web platform". I don't think anyone would be too concerned if this was clearly about the web platform bit.
Maybe we need a smaller GPL browser that doesn't have the fancy stuff but can actually be maintained by the community. Yeah it won't with with a bunch of "web apps", but it will still provide access to information. This is also why if you are making websites you need to make sure it works without js etc. Otherwise you're basically forcing people to use adware.