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

Èròjà atẹ̀lélànà yii ni a ti fi pamọ́ fọ́jọ́ pípẹ́. Jọ̀wọ́ béèrè ìbéèrè titun bí o bá nílò ìrànwọ́.

Local MP4 files always open in Firefox embedded video player

  • 5 àwọn èsì
  • 7 ní àwọn ìṣòro yìí
  • 1 view
  • Èsì tí ó kẹ́hìn lọ́wọ́ Waynerro

thejusme
thejusme
more options

I believe prior to Firefox 35 I was able to open local links to mp4 files and Firefox would prompt me for what to do (Open, Save, etc.). Now local links to mp4 files always open in the embedded Firefox video player with no option to do otherwise. I have tried setting 'media.windows-media-foundation.enabled' to 'false' and it has no effect on local links to mp4 files. All other common video formats that I have tested (e.g. avi, mpg, wmv) prompt me for what to do, as is the expected behavior.

To reproduce:

1.) Enter in url: file://///path/to/video.mp4 2.) Observe that the file opens in the embedded video player with no option to do otherwise

I believe prior to Firefox 35 I was able to open local links to mp4 files and Firefox would prompt me for what to do (Open, Save, etc.). Now local links to mp4 files always open in the embedded Firefox video player with no option to do otherwise. I have tried setting 'media.windows-media-foundation.enabled' to 'false' and it has no effect on local links to mp4 files. All other common video formats that I have tested (e.g. avi, mpg, wmv) prompt me for what to do, as is the expected behavior. To reproduce: 1.) Enter in url: file://///path/to/video.mp4 2.) Observe that the file opens in the embedded video player with no option to do otherwise

Ọ̀nà àbáyọ tí a yàn

hello, please set media.windows-media-foundation.enabled back to its default preference and try turning media.play-stand-alone to false instead.

Ka ìdáhùn ni ìṣètò kíkà 👍 8

All Replies (5)

philipp
philipp
  • Moderator
more options

Ọ̀nà àbáyọ Tí a Yàn

hello, please set media.windows-media-foundation.enabled back to its default preference and try turning media.play-stand-alone to false instead.

thejusme
thejusme Ìbéèrè olóhun
more options

And now it looks like FF36 broke this setting. I have media.windows-media-foundation.enabled set to true (default), and media.play-stand-alone set to false, and the behavior is to open mp4 files in the embedded viewer again. Sigh.

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

See:

thejusme
thejusme Ìbéèrè olóhun
more options

Your first link seems to suggest that if EITHER "media.windows-media-foundation.play-stand-alone" or "media.play-stand-alone" is set to false (only the latter is applicable on newer versions of FF) then mp4 videos won't be opened in the embedded video player. However my experience suggests this is not the case.

Waynerro
Waynerro
more options

When I have an issue with this after reinstalling Firefox I typically only have to change media.play-stand-alone to false and do not have to touch the other setting: media.windows-media-foundation.enabled.

It's insulting that Mozilla has not fixed this problem after several updates to Firefox.