If you want to try Firefox, I recommend a few of the extensions and the Noia 2 (eXtreme) theme (or the top rated GrayModern). For the extensions, I like:
- Adblock - blocks ads and you can right-click an ad to add it to the list that will be blocked.
- Mouse Gestures - use the right-click and mouse movements to do things like go Back a page, etc.
- StockTicker - can put x number of stock quotes - you can check them manually or have them update and listed in the status bar of the browser
- QuickNotes - like sticky notes. Can make up to 4 tabs of notes that you can make as a panel in your browser, tabs in your browser, or floating! By floating the quicknotes, they stay open as long as your browser is running.
I can't imagine why anyone would want to continue using IE. I really don't.