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firefox doesn't recognize mms:// even gecko-mediaplayer is correctly installed and "network.protocol-handler.app.mms" is correctly set.

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New Contributor

firefox doesn't recognize mms:// even gecko-mediaplayer is correctly installed and "network.protocol-handler.app.mms" is correctly set.

Firefox reports below message when I try to open "mms://live.hitfm.cn/fm887.wsx".

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Firefox doesn't know how to open this address, because the protocol (mms) isn't associated with any program.

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I have mplayer correctly installed and it is functional as I can play it by running "mplayer mms://live.hitfm.cn/fm887.wsx" on command line.

I have gecko media player 1.0.7 installed and I set below two confs in about:config, but it doesn't fix the issue.

network.protocol-handler.app.mms --> /usr/bin/mplayer network.protocol-handler.external.mms --> true

7 REPLIES
Site Moderator

Re: firefox doesn't recognize mms:// even gecko-mediaplayer is correctly installed and "network.protocol-handler.app.mms" is correctly set.

You need to use this pref setting to make Firefox ask which application to use:

  • network.protocol-handler.expose.mms -> false
New Contributor

Re: firefox doesn't recognize mms:// even gecko-mediaplayer is correctly installed and "network.protocol-handler.app.mms" is correctly set.

setting "network.protocol-handler.expose.mms -> false" doesn't help ...

Site Moderator

Re: firefox doesn't recognize mms:// even gecko-mediaplayer is correctly installed and "network.protocol-handler.app.mms" is correctly set.

Don't you get a pop-up to ask which application to use?

Did you remove the other mms prefs that you've created?

Try to delete the mimeTypes.rdf file in the Firefox Profile Folder to reset all file actions.

New Contributor

Re: firefox doesn't recognize mms:// even gecko-mediaplayer is correctly installed and "network.protocol-handler.app.mms" is correctly set.

No pop-up at all.

I then removed other mms prefs in about:config, it ends with the same result (doesn't work).

I then tried delete mimeTypes.rdf in profile folder (with network.protocol-handler.expose.mms set to false in about:config) but it still doesn't fix the issue.

I then read about http://kb.mozillazine.org/mimeTypes.rdf and tried to manually add one entry for mms, it still doesn't work. (it is very possible that the entry I added is malformated so firefox doesn't recognize it).

Firefox keeps telling me it doesn't understand the protocol "mms", seems to me that firefox isn't checking all the user settings I add in about:config.

Site Moderator

Re: firefox doesn't recognize mms:// even gecko-mediaplayer is correctly installed and "network.protocol-handler.app.mms" is correctly set.

Does Firefox ask which application to use if you set the network.protocol-handler.expose.mms pref to false?

Did you check the prefs on the about:config page to make sure that you do not have leftover prefs from previous attempts?

New Contributor

Re: firefox doesn't recognize mms:// even gecko-mediaplayer is correctly installed and "network.protocol-handler.app.mms" is correctly set.

Firefox didn't pop up anything to ask which application to use at all, through all the tries I made.

I did check on about:config page to make sure there is only one setting for "mms" which is "network.protocol-handler.expose.mms".

I think I can give it another try by reset all settings to defaults and start over again, will update after I try when I have time.

New Contributor

Re: firefox doesn't recognize mms:// even gecko-mediaplayer is correctly installed and "network.protocol-handler.app.mms" is correctly set.

Well I tried firefox (17.0.1) on windows xp and it pops up the "Launch Application" dialog asking me to choose an application to open mms://live.hitfm.cn/fm887.wsx, there isn't any settings related to mms in about:config. So firefox behaves differently on windows and linux when handling "unknown protocol".