The customization element was nice, but I feel like most of these issues will be addressed by future developments.

With everyone using close to the same API, we have to move backward a bit, but one browser implementing a feature like file access means developers going to other browsers and saying "Why can't I do the same thing from the other guy?"

While this somewhat exists already, it will be much louder if they aren't entirely different plugin architectures and used as a developer excuse.