I won’t pretend I had anything to do with it, but I’m happy to report that the problem of “browser hijacking” has been addressed in Mozilla 0.9.2.
I ranted about this issue last February: with increasing frequency, websites take over your web browser by spawning all sorts of popup windows, often containing advertising. I suggested that browser manufacturers allow popup windows to be enabled or disabled by the user — and this is just what the Mozilla team has done.
So, if you hate popup advertising windows, switch to Mozilla.
See the Release Notes and Mozilla’s Configurable Security Policy.