Youtube Viewer is an add-on for Firefox that allows you to watch your favorite YouTube videos directly without going to YouTube site. The working is simple after installation; launch it by going to Tools – YouTube Viewer. Type the search terms in the “Search for” text field and press Search button. The list of matching videos will be populated in the list box on the left. Select a video and press ENTER or double click on it. The video is loaded in the Video panel. Even though this add-on is an experimental one, its working is fine.
1. Download and save it on your computer.
2. Start Firefox – select ‘File menu’ – select ‘Open File’ and open the saved Youtube Viewer file
A Software Installation dialog will appear. Select Install Now to start the installation.
3. The Extension Manager will appear, and the extension will be displayed. Restart Firefox to complete the installation. The Firefox Extension has now been installed
(Remember this add-on is experimental one so no guarantees. Use the add-on at your own risk)