block webM auto play

Pimenta's Avatar


01 Mar, 2013 08:35 PM

Hi, I would like to block auto play or auto load of webM videos.

I use an (old) Apple PowerBook G4 (7450) with Mac OS 10.5.8 and TenFourFox 17.0.3.

On Firefox I can do that for Flash videos with Flashblock add-on: YouTube or Vimeo videos do not load nor do not play unless I click the extension icon and unblock them. That saves a lot of time (background tabs loading videos pages) and CPU power. I do not watch videos on YouTube of Vimeo, I use youtube-dl to download them and VLC to play them. On TenFourFox I can not do that: YouTube player notices there is no Flash, switches to the HTML5 version, loads video files and starts to play them.

Is there a way for TenFourFox to block HTML5 players video loading or webM videos auto-play?

  1. Support Staff 1 Posted by Chris (chtrusch... on 01 Mar, 2013 08:54 PM

    Chris (chtrusch)'s Avatar

    Hello Pimenta,

    I use the StopTube extension for YouTube html5.
    It's a bit unpolished, but it works.

    I don't use Vimeo that much (do they offer html5 at all?), so I can't recommend anything for that, but there may be similar extensions that work for any webm.

  2. 2 Posted by Pimenta on 02 Mar, 2013 11:23 PM

    Pimenta's Avatar

    Thanks, Chris.

    I will try the StopTube extension.

    Vimeo does not offer HTML5 webM, only H.264. Vimeo's video pages notice TenFourFox has no Flash Player then display an error message about it: "This video can't be played with your current setup. Please switch to a browser that provides native H.264 support or install Adobe Flash Player."

  3. Support Staff 3 Posted by Chris (chtrusch... on 08 Mar, 2013 09:15 AM

    Chris (chtrusch)'s Avatar

    I hope you tried StopTube before it stopped working (yesterday or the day before) because of a YouTube change. Sorry, there's no working alternative right now. Waiting for an updated version of StopTube…
    Edit: StopTube was updated to 0.2.1 today, so the developer seems to be quick. It's working again and also looking better.

  4. 4 Posted by Pimenta on 26 Mar, 2013 03:14 AM

    Pimenta's Avatar

    I tried StopTue after it stopped working and then forgot about it -- no YouTube on TenFourFox for two weeks, I had to use Safari with ClickToPlugin extension. Just noticed StopTube works again. Thanks for the note!

Reply to this discussion

Internal reply

Formatting help / Preview (switch to plain text) No formatting (switch to Markdown)

Attaching KB article:


Attached Files

You can attach files up to 10MB

If you don't have an account yet, we need to confirm you're human and not a machine trying to post spam.

Keyboard shortcuts


? Show this help
ESC Blurs the current field

Comment Form

r Focus the comment reply box
^ + ↩ Submit the comment

You can use Command ⌘ instead of Control ^ on Mac

Recent Discussions

22 Sep, 2020 09:13 AM
21 Sep, 2020 08:35 PM
20 Sep, 2020 04:07 AM
18 Sep, 2020 02:23 AM
13 Sep, 2020 08:08 AM