How to Choose which browser is the default on Mac OS X
If you want to permanently set the default browser on your Mac notebook or desktop, take a look at this walkthrough. You can set any browser to open up by default when you click a link or try to access webpages in OS X.
The preferences in the operating system let you pick both the default web browser and the default search engine. Try it out with whichever is your favorite--Firefox, Chrome, or Safari!