I started using Chrome before I became a developer. I just found that it was faster, and I found it to be a better overall experience. Then with the increasing integration with my Google accounts pretty much cemented it. Now that I'm a front end web developer, I've tried the tools for all of the major browsers and prefer Chrome's dev tools because they're superior. The interface is better and I like the usability a lot more. Now more capabilities, such as writing to files from the console, are just continuing to cement it as superior for developers. There are also, I believe, more browser extensions for Chrome that make life as a developer way easier.