Firefox is a web browser which allows you to view webpages on the World Wide Web. Firefox is developed by Mozilla, and is available free of charge.
Firefox 19 and later comes with its own built-in PDF viewer. To disable the built-in PDF viewer and use Adobe Reader (or another PDF viewer), go to Firefox > Preferences > Applications panel. Follow the directions listed here.
Use Firefox 17 ESR (latest build) for web applications that require it. Use Firefox 21 (latest build) for all other web browsing.
Note: Google@UH apps (gmail, gcal, gdocs) are supported on the current version of Firefox, the version just preceding it or Firefox 17 ESR. Firefox is on a rapid-release schedule with a new version released approximately every 6 weeks. Check for the most current version of Firefox here.