Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

Rechercher dans l’assistance

Évitez les escroqueries à l’assistance. Nous ne vous demanderons jamais d’appeler ou d’envoyer un SMS à un numéro de téléphone ou de partager des informations personnelles. Veuillez signaler toute activité suspecte en utilisant l’option « Signaler un abus ».

En savoir plus

Firefox will not play some videos, with the message: "We cannot play the video in this browser. Please try a different web browser". How do I fix this?

  • 6 réponses
  • 1 a ce problème
  • 5 vues
  • Dernière réponse par James

more options

I see this with videos on twitter.com. There is nothing on the video to click on to figure out what kind of video it is. This is on Fedora Linux: I have the Open H264 and Flash plugins installed. Many other videos (e.g., youtube) play ok.

(I've attempted to upload a screenshot with this, but it won't upload.)

I see this with videos on twitter.com. There is nothing on the video to click on to figure out what kind of video it is. This is on Fedora Linux: I have the Open H264 and Flash plugins installed. Many other videos (e.g., youtube) play ok. (I've attempted to upload a screenshot with this, but it won't upload.)

Toutes les réponses (6)

more options

Here is a screenshot.

more options

Are you able to play HTML5 player videos in general?

This page can show if you fully support the HTML5 player on Youtube for example as all check marks should ideally be blue. https://www.youtube.com/html5/

If you have two or more red checks then you may be missing packages like not having FFmpeg installed in package manager on your Linux distro.

more options

Please provide public link(s) (no password) that we can check out. No Personal Information Please !

Make sure you are not blocking content.

Start Firefox in Safe Mode {web link} by holding down the <Shift> (Mac=Options) key, and then starting Firefox.

A small dialog should appear. Click Start In Safe Mode (not Refresh). Is the problem still there?

more options

FredMcD, the OP and image mentions the site. Basically videos posted on Twitter that uses the HTML5 player.

more options

And how does one check out the web pages without their addresses?

more options

I take it you do not use Twitter. This is the tweet that is in image. https://twitter.com/KeeblerElves/status/973181819771412482