This Add-on adds the &html5=1 option to YouTube-URLs during page load. This happens without any user interaction, like clicking a button. Simply turn this Add-on on or off, whether you want to use it or not.
- No need to activate the HTML5-Player via youtube.com/html5
- This means also that you are now able to delete cookies after closing Firefox, if you want to (eg. for privacy reasons)
- You can activate Click-To-Play for Flash on YouTube, because flash is no longer needed for most videos
Note that YouTube serves some videos only via flash player - that's no bug of this Add-on.
The Add-on works only with addresses like http(s)://www.youtube.com/watch(...)
Videos on channel pages are currently not supported.