Youtube has supported HTML5 playback for about 4-5 years, though some videos do not. There's a few plugins (eg: youtube-center) that let you play any video via

Youtube has supported HTML5 playback for about 4-5 years, though some videos do not. There's a few plugins (eg: youtube-center) that let you play any video via the HTML5 player. Personally, I got rid of flash sometime around 2011. The only side effect is firefox not crashing ever. As a bonus, I noticed that a few months ago youtube added video ads that you can't skip to lots of videos (noticed it on my gf's iPad). You'll never have to deal with those with the HTML5 player (or maybe it's just adblock).