為了改善您的使用體驗,本網站正在進行維護,部分功能暫時無法使用。若本站的文件無法解決您的問題,想要向社群發問的話,請到 Twitter 上的 @FirefoxSupport 或 Reddit 上的 /r/firefox 發問,我們的社群成員將很快會回覆您的疑問。

搜尋 Mozilla 技術支援網站

防止技術支援詐騙。我們絕對不會要求您撥打電話或發送簡訊,或是提供個人資訊。請用「回報濫用」功能回報可疑的行為。

了解更多

Firefox downloading .mp4 rather than playing

  • 6 回覆
  • 11 有這個問題
  • 3 次檢視
  • 最近回覆由 daksh85

more options

I have Firefox 45.0.1 installed on windows 2012 server, and whenever I try playing .mp4 on Firefox, it downloads .mp4 rather than playing it on browser. Based on reading few posts on same issue, I did set the following setting "media.play-stand-alone" to true, and "media.windows-media-foundation.enabled" to true. But it still Firefox is downloading files rather than playing.

Can anyone please let me know what settings, and files have to be tuned in Firefox in order for it to play .mp4 on browser rather than playing?

I have Firefox 45.0.1 installed on windows 2012 server, and whenever I try playing .mp4 on Firefox, it downloads .mp4 rather than playing it on browser. Based on reading few posts on same issue, I did set the following setting "media.play-stand-alone" to true, and "media.windows-media-foundation.enabled" to true. But it still Firefox is downloading files rather than playing. Can anyone please let me know what settings, and files have to be tuned in Firefox in order for it to play .mp4 on browser rather than playing?

所有回覆 (6)

more options

Did you save the MP4 files to your computer and try to play them locally or are they hosted on internet?

With files hosted on internet it depends on how the server sends the files.

more options

The file is being played via interner using amazon cloudfront. It plays well on chrome but when played via firefox it asks for download on windows server.

more options

Is Firefox able to play the MP4 video locally? (after downloading it)

more options

@oxyOxylatium said

Is Firefox able to play the MP4 video locally? (after downloading it)

It's not able to even play Video locally. I save the file, and ask it open with Firefox but it gives me the same dialog asking "What should firefox do with this file" .. Attached the image

But the file plays fine with Chrome browser

more options

Rename/remove the mimeTypes.rdf file in the Firefox profile folder to reset all file actions.

You can use this button to go to the current Firefox profile folder:

more options

cor-el said

Rename/remove the mimeTypes.rdf file in the Firefox profile folder to reset all file actions. You can use this button to go to the current Firefox profile folder:

I removed all entries in mimeTypes.rdf file in the Firefox profile folder to reset all file actions, but still I am seeing the same behavior. Firefox is not able to play video locally too. I save the file, and ask it open with Firefox but it gives me the same dialog asking "What should firefox do with this file