End-User License Agreement
YouTube requires that you accept the following End-User License Agreement before installation can proceed:
This add-on is provided as is without any guarantees or warranty. In connection with the software, the Author, David Iglesias "ditman" makes no warranties of any kind, either express or implied, including but not limited to warranties of merchantability, fitness for a particular purpose, of title, or of noninfringement of third party rights. Use of the software by a user is at the user's risk.
This add-on is not compatible with your version of Firefox because of the following: