A Dark and Smooth Theme for YouTube
Dark Theme for YouTube™ addon makes YouTube website look much easier on your eyes at night time. It adds a nice Dark theme to YouTube with a smooth black background.
a. Automatically sets a Dark theme for all YouTube pages.
b. Supports both HTML5 and Flash YouTube players.
c. Has an in-page switch button (at top right corner in YouTube website) to turn the dark theme ON or OFF.
d. The addon has 2 dark themes. Theme (A) uses standard CSS techniques to darken the YouTube page. Theme (B) uses CSS filters to do this job. (use the in-page button to switch between these two themes).
To submit bugs, please visit addon's homepage (http://mybrowseraddon.com/youtube-dark.html) and fill the bug report form.