Everyone mentions compatibility and performance as the main reasons, but this still doesn't make any sense to me. If I switch to a browser which has a stated goal of protecting my privacy and protecting the freedom of the web, then performance and web site compatibility is much further down my list of priorities.
Even if you have personal priorities for privacy, surely you can understand that many user's first expectation for a web browser is for websites to work correctly.
We've kind of lost the plot if we get too far away from the core notion that a web browser is for correctly and completely rendering websites. The user population don't use web browsers to hide, they use it to look at the internet and do internet work. If a browser has any problems doing this, it not going to be relevant.
I'd agree but performance and compatibility bubbles up to top concern pretty quickly when you use something nearly constantly (which I'd say is applicable for a browser).
