Featured Firefox Extension: Stop YouTube Ads with TubeStop

Lifehacker: “Windows/Mac/Linux (Firefox): Firefox extension TubeStop disables autoplay on YouTube videos and blocks obtrusive overlay advertisements.
Deactivating autoplay will come in handy for anyone who’s followed a
YouTube link and accidentally blared a video through the workplace,
while the incidental overlay ad “blocking” very quickly dispenses with
a new feature that a lot of avid YouTube fans aren’t happy with.
TubeStop works by replacing the on-site YouTube player with the
embedded player you’d see on another site (which currently doesn’t host
ads and doesn’t autoplay). TubeStop is free to download, works wherever
Firefox does.”

TubeStop [Chris Finke]