Once you install this extension, you won't have any problems to play WMV videos on your browser, something specially useful if you get annoyed when you have to download them instead of viewing them on the fly.
Codecs installed on Flip4Mac have been optimized to improve the performance and the results are great. It also supports AVI, ASF and ASX.
Don't hesitate, it's the easiest way to view HD WMV videos on Mac.
For Mac OS X 10.3.9 or higher, and Quicktime 6.5 or higher.