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#4261 tompkin

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Posted 16 May 2015 - 21:35

Yep, the W3C spec about it is called "Encrypted Media Extensions", and the actual DRM modules themselves are called "Content Decryption Modules" (Specifically unspecified, security through obscurity and all that)

The EME spec just details how a page can request playback of DRM locked material, and a example DRM module called "Clearkey" (Which is actually completely specified and is something like plain AES encryption, so nobody minds it), all communication with the actual DRM module is left up to the browser, and every browser does it differently with a different DRM backend.

Edit: How's this for fragmentation, Chrome supports the "Widevine" DRM scheme, IE11 uses "PlayReady", Firefox uses "Primetime" and Safari exposes "Fairplay", and content providers wanted this mess.

Well, more power to them if they get it to work but the problem with DRM has always been that it punished the honest person while the dishonest person just went about their business.

 

Hopefully it will be better. 




#4262 mastercoms

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Posted 16 May 2015 - 23:29

Multiprocess Firefox



#4263 The_Decryptor

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Posted 16 May 2015 - 23:32

...
How do you implement it if you don't know how it works?


You don't, that's the point. If you want to support the DRM modules you need to enter into a business agreement with the DRM provider. There is Clearkey, but the usefulness of that is very limited, and nobody actually wants it (Too weak for content providers, and doesn't actually lock down the file in any way)

The point of Clearkey is that you can serve your video over a public CDN, while then transferring the decryption key to the end user over a secure (TLS) channel. Problem is you either need to share the key between all users (Making Clearkey useless), or re-encode the file for each user, defeating the point of caching servers, and basically re-implementing what TLS does. It might be useful for live broadcasts, but that's about it really.

Well, more power to them if they get it to work but the problem with DRM has always been that it punished the honest person while the dishonest person just went about their business.
 
Hopefully it will be better.


The Adobe provided modules is fairly standard as DRM modules go, what's different is that Mozilla sandboxes the system from it, basically treats it like a untrusted plugin and greatly limits what it can do.

I mean, it still sucks, but at least they're trying to minimize the harm and impact, they didn't rush into supporting it like Google did.

#4264 mastercoms

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Posted 17 May 2015 - 00:12

You don't, that's the point. If you want to support the DRM modules you need to enter into a business agreement with the DRM provider. There is Clearkey, but the usefulness of that is very limited, and nobody actually wants it (Too weak for content providers, and doesn't actually lock down the file in any way)

The point of Clearkey is that you can serve your video over a public CDN, while then transferring the decryption key to the end user over a secure (TLS) channel. Problem is you either need to share the key between all users (Making Clearkey useless), or re-encode the file for each user, defeating the point of caching servers, and basically re-implementing what TLS does. It might be useful for live broadcasts, but that's about it really.

What about this? https://github.com/f...cryption-module I don't know what this uses



#4265 The_Decryptor

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Posted 17 May 2015 - 01:39

Interesting project, but apart from letting Firefox use PlayReady (or such), it doesn't offer much.

It's still reliant on the DRM module providers to release a module for the platform, won't let Firefox on Linux use PlayReady, etc.

Edit: And technically Firefox already supports something like this, their CDM API is "agnostic" and can actually be used to provide support for any codec (Was first used for OpenH264 support for WebRTC), they're also looking at extending it to JavaScript so that web pages could provide their own video decoders for things.

#4266 .stan

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Posted 20 May 2015 - 03:48

http://www.gavinshar...eaving-mozilla/

 

And the next big one is leaving...



#4267 MikeM97

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Posted 20 May 2015 - 11:31

http://www.gavinshar...eaving-mozilla/

 

And the next big one is leaving...

 

It would matter a lot.



#4268 +Zlip792

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Posted Today, 21:16

Just noticed:

 

about:crashes look:

 

Newlook.PNG



#4269 Boo Berry

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Posted Today, 21:27

No crash reports have been submitted.

 

:D

 

No crashes for me in Firefox or Nightly. In the latter I'm running the e10s dev build of LastPass and that's it, no other extensions.



#4270 LimeMaster

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Posted Today, 21:36

No crash reports have been submitted.
 
:D
 
No crashes for me in Firefox or Nightly. In the latter I'm running the e10s dev build of LastPass and that's it, no other extensions.

But the point on Nightly builds is to find bugs & attempt to crash it, so Mozilla can fix it. :p

#4271 Boo Berry

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Posted Today, 21:49

Some of the issues people encounter in Nightly are due to plugins and extensions breaking. :p I try to keep both Firefox and Nightly as 'light' as possible, e.g. only LastPass is installed for both, no other extensions (don't need 'em, actually).