Right now I am typing on my first mac, a 12" iBook that I purchased from Xephian. I still have to get used to the operating system after using windows for my entire life. A few easy stupid questions: I like Firefox browser so I went to the website and downloaded the mac version and then Safari gave me the warning this a program are you sure that you want to run it. I clicked ok and then it did something and left me with a "firefox" drive on my desktop and a firefox.dmg file. I am supposed to be doing anything with those? Can I delete them? Thanks and sorry for the stupid easy question.