Browser Preferences

So when it comes to internet browsers, I must say I really enjoy using Safari.  I think it works well, moves quick, and generally gives me no problems.  One thing that does annoy me about Safari is that it is not compatible with my work grading website, and therefore must use Firefox.  Maybe it is because I am a creature of habit, but I prefer the layout of Safari to Firefox.  I am not sure why Safari can not support the website, but every time I care to use it, I must exit out of Safari and use Firefox. Grrrr...