Step-By-Step Guide: Embedded Windows Media in Firefox - MozillaZine Forums: "If some of the files are still missing, you can download the individual files from dlldump.com: * npdsplay.dll: http://www.dlldump.com/dllfiles/N/npdsplay.dll * npwmsdrm.dll: http://www.dlldump.com/dllfiles/N/npwmsdrm.dll * npdrmv2.dll: http://www.dlldump.com/dllfiles/N/npdrmv2.dll Download them to the Firefoxs plugins folder (usually C:\Program Files\Mozilla Firefox\plugins). " Problem: Windows Media Player 10 wouldn't 'play' with Firefox 1.5. Translation: I couldn't watch Jon Stewart and Stephen Colbert anymore. bwaaaaa..... Solution: Downloaded and copied the three above files into the firefox plugin folder. And now they play together. The real story: I uninstalled, reinstalled both Firefox and WMPlayer several times, no luck, and then found this reference at the Firefox forum site: http://forums.mozillazine.org/viewtopic.php?t=206213#RestoreWMP That's where I found several good leads, and diagnosed problem, found thirdparty files and got things to work. To have spent this much time is not acceptalbe to me, and for sure not to the normal mortal. I will be looking hard at IE7 when it comes out.