We categorize browsers by their rendering engine. For us as developers it does not matter how a browser
We try to support standard browsers as much as we can. They account for over 98% of the webbrowsers in use today:
||since version 4 (4, 5, 5.5 and 6)
||Firefox, Mozilla, Netscape ...
| KHTML / WebCore
||since 7.11 (7, 8)