When the solution to a problem that nearly every user will have is, "Use an add-on", then that's clearly a time when the design/dev team should go back and re-think their implementation. I can see the phone calls now, "Yes, mom - you need to go install an add-on. What's an add-on? Well, maybe they call it an extension - depends which screen you're on. What's an extension?" Ugh - awful idea.

And then you end up with the old Netscape Communicator suite, until someone wants a "fast" minimal browser, maybe by moving some of the features out of the main browser into extensions....

It's the circle of life!