Mozilla VPN is currently experiencing an outage. Our team is actively working to resolve the issue. Please check the status page for real-time updates. Thank you for your patience.

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

ค้นหาฝ่ายสนับสนุน

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.

เรียนรู้เพิ่มเติม

หัวข้อนี้ถูกเก็บถาวรแล้ว โปรดถามคำถามใหม่หากคุณต้องการความช่วยเหลือ

I broke watch mp4 in browser

  • 4 การตอบกลับ
  • 1 คนมีปัญหานี้
  • 1 ครั้งที่ดู
  • ตอบกลับล่าสุดโดย G_Eak

G_Eak
G_Eak
more options

I just updated my Firefox on my windows 7 laptop (76.0.1) and could no longer stream live video on Youtube. Yesterday I went thru various troubleshooting sites and finally got Youtube streams to work again.

This morning I see that when I watch an MP4, Firefox downloads the video. After download, it ask me What should Firefox do with this file? Default Windows Media Player.

What did I break? How do I have Firefox start video immediately in Firefox?

Thanks!!!

I just updated my Firefox on my windows 7 laptop (76.0.1) and could no longer stream live video on Youtube. Yesterday I went thru various troubleshooting sites and finally got Youtube streams to work again. This morning I see that when I watch an MP4, Firefox downloads the video. After download, it ask me What should Firefox do with this file? Default Windows Media Player. What did I break? How do I have Firefox start video immediately in Firefox? Thanks!!!

วิธีแก้ปัญหาที่เลือก

Thanks for the reply McCoy,

I had checked media.play-stand-alone. It was set to true. I gave up. After copying passwords & favorites file, I uninstalled Firefox, deleted profile and reinstalled Firefox. That fixed it. So far, all Youtube is working and videos play in Firefox.

I suspect there was an add-on pseudo running but not showing up in "Add-ons".

Appreciate the reply!!! issue closed.

อ่านคำตอบนี้ในบริบท 👍 0

การตอบกลับทั้งหมด (4)

G_Eak
G_Eak เจ้าของคำถาม
more options

Dam. The original problem is back. Firefox is driving me nuts.

https://www.youtube.com/watch?v=3pN9WU1S8nQ Your browser does not currently recognize any of the video formats available. Click here to visit our frequently asked questions about HTML5 video

G_Eak
G_Eak เจ้าของคำถาม
more options

I use to run AdBlocker (or something like that) but see that it is not showing up in Add-ons, extensions, Plugins.

Frustrating.

McCoy
McCoy
more options

G_Eak said
This morning I see that when I watch an MP4, Firefox downloads the video. After download, it ask me What should Firefox do with this file? Default Windows Media Player.

Hello   G_Eak,

Would you try this please :

Type in the address bar   about:config   and press Enter.
(ignore the warning)

Type in the search bar and look for the preference :

media.play-stand-alone   and make sure its value is set to   true.

If you had to change the value, then close and restart Firefox.

Any luck ?

G_Eak
G_Eak เจ้าของคำถาม
more options

วิธีแก้ปัญหาที่เลือก

Thanks for the reply McCoy,

I had checked media.play-stand-alone. It was set to true. I gave up. After copying passwords & favorites file, I uninstalled Firefox, deleted profile and reinstalled Firefox. That fixed it. So far, all Youtube is working and videos play in Firefox.

I suspect there was an add-on pseudo running but not showing up in "Add-ons".

Appreciate the reply!!! issue closed.