Am 09.06.2017 16:49, schrieb James Pearson:
Also, although about:plugins gives the Path as in a user profile
directory (as .../gmp-gmpopenh264/system-installed), it isn't actually
there ... but symlinking or copying the the
'gmp-gmpopenh26/system-installed' contents to the Path given in
about:plugins - and then it does work ...
Found a solution to use also use a system wide directory without having
to symlink it into the user profile. The following extended code will
add your directory as an additional path where GMP plugins are searched
for before setting the preferences:
Components.utils.import("resource://gre/modules/FileUtils.jsm");
var gmpService =
Components.classes["@mozilla.org/gecko-media-plugin-service;1"].getService(Components.interfaces.mozIGeckoMediaPluginChromeService);
gmpService.addPluginDirectory(FileUtils.getDir("GreD", ["browser",
"plugins", "gmp-gmpopenh264", "system-installed"]).path);
lockPref("media.gmp-gmpopenh264.autoupdate", false);
defaultPref("media.gmp-gmpopenh264.enabled", true);
lockPref("media.gmp-gmpopenh264.version", "system-installed");
Any number of directories can be added via
gmpService.addPluginDirectory, and they don't necessarily have to exist.
For the files to be found the second last directory name has to match a
plugin name and the last directory name has to match the fake version
number ("system-installed" in your example).
This also seems to work for the Widevine plugin, but it requires an
additional setting:
lockPref("media.gmp-widevinecdm.autoupdate", false);
defaultPref("media.gmp-widevinecdm.enabled", true);
lockPref("media.gmp-widevinecdm.version", "system-installed");
if (!
Services.prefs.getBranch("").prefHasUserValue("media.eme.enabled")) {
pref("media.eme.enabled", true);
}
Reason: It seems the "media.eme.enabled" preference cannot be a
defaultPref, but has to exist in user context (probably because the
default value is overwritten later in the Firefox startup) or must be
locked.
Now the only remaining question is whether it's legal to redistribute
the Widevine plugin that way ;-)
Regards,
--
Ignaz Forster
Landeshauptstadt München
it@M - Dienstleister für Informations- und Telekommunikationstechnik
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