This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

Quicktime videos play sound but no video in Firefox 4

  • 3 replies
  • 24 have this problem
  • 13 views
  • Last reply by invaluable

Sarah German
Sarah German
more options

I can't view any Quicktime video files in Firefox 4. My Quicktime plugin is up-to-date. I tried in Safe Mode, too, and still didn't have any luck.

I was testing with trailers on Apple.com - I figure they've got them embedded right - and only heard sound and saw the player controls. No video.

I can't view any Quicktime video files in Firefox 4. My Quicktime plugin is up-to-date. I tried in Safe Mode, too, and still didn't have any luck. I was testing with trailers on Apple.com - I figure they've got them embedded right - and only heard sound and saw the player controls. No video.

Chosen solution

Does it help if you run the Firefox program as a 32 bit application?

  1. Close Firefox
  2. Open the Applications folder in Finder
  3. Control-click the Firefox.app icon
  4. Select "Get Info"
  5. Check the box, "Open in 32-bit mode"
  6. Close the "Firefox Info" window
  7. Restart Firefox
Read this answer in context 👍 0

All Replies (3)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

Chosen Solution

Does it help if you run the Firefox program as a 32 bit application?

  1. Close Firefox
  2. Open the Applications folder in Finder
  3. Control-click the Firefox.app icon
  4. Select "Get Info"
  5. Check the box, "Open in 32-bit mode"
  6. Close the "Firefox Info" window
  7. Restart Firefox
Sarah German
Sarah German Question owner
more options

Thanks for your response! This worked for me. But... what does that mean?

I'm a web developer and trying to put an embedded streaming video on a website, so I ran into this browser issue while doing some pre-launch testing. I'll need to be able to help other people troubleshoot if they run into the same problem I did. It'd be cool if I could at least sound smart about it when explaining why the video won't play. :)

Does the fact that it works in 32-bit mode mean it's an issue with Firefox, not the video itself? Or would it be the Quicktime plugin? Would I just have to recommend using a different browser?

invaluable
invaluable
more options

I'm not having a sound issue, but lots of stops and starts instead. Quicktime is atrocious in Firefox 4, but when I test a QT site with Chrome, it works fine.

This needs to be fixed at the code level... not using a workaround like this. :-(

Modified by invaluable