I can live without Microsoft Word, and I'm confident I could manage well enough if you removed Excel from my PC. Even my favorite e-mail app is a nonessential.
But take away my browser, and I might as well not even start up my PC.
Mozilla Firefox is the first program I open and the last one I close each workday (or worknight, as the case may be). I found some great time-savers for the program. And since many of you prefer Internet Explorer, I've got some productivity-enhancing keyboard shortcuts for both browsers.