Ask HN: How fun would be Browser Development?

I recently got a chance to work with a giant with their Browser Development Team. It sounds fascinating at first, but when i digged deeper it dint looked much interesting. Most of the browser things would be taken care by Webkit itself i guess (like loading, policies, rendering etc.). Is browser development all about providing a frame for WebKit, handling bookmarks and other extra stuffs?? Maybe i am missing something out here, browser-ninjas please help, i am confused on taking up this job now!