By default, Firefox uses the system's default audio device for HTML5 audio playback and the program offers no possibility to select an alternative audio device, if several audio devices are present on ...
In Google Chrome there is an extension that add &webm=1 in all YouTube search URIs. I did not find an alternative add-on in Firefox, any alternative methods? Thanks.
Is there a plugin for firefox to validate HTML 5? I've always used this but if my webpage has a <!DOCTYPE HTML> doctype it complains about it not having a doctype at all. I specifically would ...