My Mac had the 3.6.13 version originally and kept getting the notice to update. Every time I tried to update following the instruction that said "When prompted, drag the Firefox icon into the image of your Applications folder". But I was never prompted. When I downloaded it showed an icon on my desktop that says "Firefox 5.0.1.dmg" but no further instruction as to what I should do. There are also now two rectangular icons on my desktop that look like minature drives that are blue with a white Firefox symbol on it and are named Firefox. Checking the info of them shows one as version 3.6.13.dmg and the other as version 5.0.1.dmg. Both say for Mac OS Extended. The 3.6.13 shows the date created as 12-3-10 (the date I bought the Mac) and the other shows 12-7-2011. What should I do? The update notice happens at least once per day.