First, sincere thanks to everybody who has contributed to this thread. I've been a lurker until now, but really appreciated the information that's been shared. Hopefully I can contribute something, but I have to start with a question...
Is there any further progress or ideas on getting Widevine working in Firefox (51.0.1 or 52 esr) under XP 32 bit?
I ask because a service (TVNZ OnDemand) I use here in New Zealand has migrated from PrimeTime to Widevine-exclusive. As a result, the service no longer works in Firefox. It works fine in Chrome 49, but I prefer to use Firefox if possible.
Using the information on pages 4 and 5 of this thread I was able to get the Widevine plugin to install. However I suspect there's some code that's preventing it from being used on XP. It won't kick in even though I've created the requisite forseSupported settings. Perhaps this is the blockage?
https://github.com/mozilla/gecko-dev/blob/master/dom/media/eme/MediaKeySystemAccess.cpp#L315
If it is, is there anybody that could build a patch with that condition removed... or perhaps there's a workaround that I'm not aware of?
Thanks in advance for any advice!