Web browsers are generally free to use and there are several serious contenders and many less popular ones.

So the main thing they should be competing on is user experience.

But it seems to me that browsers frequently fail to deliver a user-first experience.

The browser should only take actions specifically requested by a user, as his agent. Everything about the experience needs to be reframed from that perspective.

Some browsers lately seem to be doing a little better at this, but just adding "advanced flag" features on to an existing product isn't going to help mainstream users at all.