Firefox: Disable video autoplay
about:config
media.autoplay.enabled -> true
plugins.click_to_play -> true
Addons:
Youtube No Buffer (stop autoplay)
Youtube Player Adblocker
YouTube All HTML5 (can also disable annotations)
Autoplay No More (Disable play next)
Firefox: Disable fullscreen message/warning
about:config
full-screen-api.warning.timeout
Value: time in ms, 0 to disable message
Chromium/Chrome: Disable fullscreen message/warning
not possible any more
Uploading ....