No they won't, because it would kill the web. That little bit is ownership: branding and control. There's no Adblock for their app. Their app isn't called Firef

No they won't, because it would kill the web. That little bit is ownership: branding and control. There's no Adblock for their app. Their app isn't called Firefox it's Company Name. There's no dev tool for the app, so less chance to find out all the insecure ways it siphons my data. They control updates, so their ActiveX-style monstrosities are always going to be displayed the same. Get the idea?