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I have a couple of videos open on Firefox. As I refer to them often, I prefer to keep them as a tab rather than as a bookmark. However, every time I reboot Firefox, they start to play. Can I have them come up but not start to play until I select them to start? Thanks.

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up vote 0 down vote accepted
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This also seems interesting.+1. I will try it as soon as I can remove flashblock. Thanks. – Xavierjazz Sep 8 '10 at 23:21
This was gone by the time I got there, but I found so you will get the accept. Thanks. – Xavierjazz Nov 14 '10 at 22:30
@Xavierjazz and subanki: Both and are now not available for download and are marked as having "been removed by its author". – galacticninja Jan 12 '15 at 3:49

The FlashStopper extension can stop Flash and HTML5 media from autoplaying. It will show the video preview thumbnail instead of autoplaying.

FlashStopper in action.

Alternatively, the Flash Control extension can be used to show a button or placeholder that should be clicked on before allowing a Flash or HTML5 media to appear.

Flash Control in action.

The YouTube Center user script / browser extension can stop YouTube videos from auto-playing and auto-buffering, among other features.

YouTube Center settings screenshot

The YouTube High Definition extension can be configured to stop YouTube from auto playing videos, among other features:

YouTube High Definition screenshot - disable YouTube auto-play

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FlashBlock can do this.

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FlashBlock is not working for me, youtube keeps on playing. Indeed, Firefox is crashing soon after being launched. When I go to "add-ons" I do not see the installed Flashblock and seem to have no way to remove it. How can I remove it? Perhaps I am looking in the wrong place? – Xavierjazz Sep 8 '10 at 20:06
Firefox has a safe-mode which allows you to disable troublesome extensions. How to run it depends in your platform though.. – Remy Sep 9 '10 at 0:13
@remyhorton - thanks, I guess, but really, this is no help. How about some direction? Regards, – Xavierjazz Sep 9 '10 at 0:33
@remyhorton - Thanks. – Xavierjazz Sep 9 '10 at 13:41

Download Greasemonkey for Firefox.

Download the YouTube Enhancer userscript.

At the top of the window, there is an option where you can set automatic buffering to off or autoplay to off. Same consequence, but with auto buffer, you need to wait for it to buffer (no problem on fast internet anyway).

Also other goodies as well:

  • loop
  • kill stream
  • loop between two set points
  • change quality easily
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This looks interesting -+1. I will try this as soon as I am sure I removed Flashblock. Thanks – Xavierjazz Sep 8 '10 at 23:20

If you install the NoScript plug-in for Firefox it will block YouTube videos from loading automatically. You can then simply allow the Javascript/JAVA/Flash object every time you wish to view it.

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