Primetime Content Decryption Module provided by Adobe Systems, Incorporated will be installed shortly
But it never does.
I have Firefox installed on two computers, and on one of them the DRM addon never installs. I've uninstalled Firefox, and deleted all Firefox related files from appdata.
The computer that has the DRM addon installed used to be running Windows 8.1, now Windows 10. The computer that won't install the DRM addon is running Windows 7. On both computers I use 64-bit Firefox beta, which at the moment is on version 39.
Wšě wotmołwy (5)
And these are all the config options I have on the Win7 computer that starts with media.gmp.
media.gmp-gmpopenh264.lastUpdate;1435227592 media.gmp-gmpopenh264.version;1.4 media.gmp-manager.buildID;20150618135210 media.gmp-manager.cert.checkAttributes;true media.gmp-manager.cert.requireBuiltIn;true media.gmp-manager.certs.1.commonName;aus4.mozilla.org media.gmp-manager.certs.1.issuerName;CN=DigiCert Secure Server CA,O=DigiCert Inc,C=US media.gmp-manager.certs.2.commonName;aus4.mozilla.org media.gmp-manager.certs.2.issuerName;CN=Thawte SSL CA,O="Thawte, Inc.",C=US media.gmp-manager.lastCheck;1435551704 media.gmp-manager.url;https://aus4.mozilla.org/update/3/GMP/%VERSION%/%BUILD_ID%/%BUILD_TARGET%/%LOCALE%/%CHANNEL%/%OS_VERSION%/%DISTRIBUTION%/%DISTRIBUTION_VERSION%/update.xml media.gmp-provider.enabled;true
And config options that start with media.eme and media.mediasource.
media.eme.apiVisible;true media.eme.enabled;true media.mediasource.enabled;true media.mediasource.mp4.enabled;true media.mediasource.webm.enabled;false media.mediasource.whitelist;true
The OpenH264 plugin is used for WebRTC (Hello) and not for playing media files, so media.gmp-gmpopenh264 prefs wouldn't apply the the DRM module.
See Supported platforms:
Currently, Adobe Primetime is only available in Windows Vista/7/8 and above when using 32-bit versions of Firefox.
Mac OS X, Linux, Windows XP and 64-bit versions of Firefox are currently not supported.
Yes, I am aware it does not, I was simply being thorough by including all config options in the categories that may be relevant to the problem.
I see 64-bit versions of Firefox are not supported, that does not explain why it is installed on another computer that is likewise using 64-bit Firefox 39. Perhaps the information is outdated?
In the case it is not, may I suggest to improve the notification tooltip to say "Current version of Firefox is not supported by this plugin" or something, instead of implying the plugin will be installed shortly, but never does?
Did you try it with a 32 bit Firefox version?