There are an increasing number of mobile browsers that are now available. Internet Explorer and Safari are the default browsers for Windows and iOS, respectively. Other browsers including Opera and Dolphin are also becoming more popular. Similar to traditional web development, cross-browser compatibility needs to be carefully considered. This is because mobile functionality that works well in one browser might not work quite so well in a different browser. Testing across all popular browsers remains an important part of mobile web development.
Note
Android devices are shipped with a variety of default browsers. These are often described generically as the 'Android browser'. This can present challenges that are described in a presentation that can be found at http://slides.com/html5test/the-android-browser#/.
There are an increasing number of resources such as modernizer, yepnope, and caniuse.com to help you with the challenges of testing.
Note
See the excellent article in Mashable on mobile testing tools.
The article can be found at: http://mashable.com/2014/02/26/browser-testing-tools/ #.