Brave-browser: Unable to stream from Xfinity on Windows machines

[Brave-Matt]

Description

When trying to stream content through an Xfinity account (https://xfinity.com/stream), Xfinity shows "Sorry, we're having some trouble" error (see images below).
This is true for Windows systems but MacOS streams Xfinity without issue.

Steps to Reproduce

1. Ensure that Widevine plugin is installed
2. Visit xfinity.com/stream and login to your account
3. Enable flash for the site (required)

Actual result:

Error is thrown and streaming is not initiated:

Expected result:

Authenticate into Xfinity.com/stream and stream video content.

Reproduces how often:

Always

Brave version (brave://version info)

Tested on
Developer Build - v0.61.20
Beta Build - v0.60.23
Release Channel - v0.59.35

Website problems only:

• Does the issue resolve itself when disabling Brave Shields? No
• Is the issue reproducible on the latest version of Chrome? No

Additional Information

Console view and user reports:

https://www.reddit.com/r/brave_browser/comments/anewog/cannot_get_xfinity_stream_to_work_in_brave/eftmhmj/

[Samdvich]

I've seen this issue around with other services using Caddy.

• https://caddyserver.com

[SevilleCode]

Got an interesting result when I tried to stream Xfinity in Brave Nightly (0.68.48). First I received a message that there was a problem authenticating my account, and it needed me to sign out and sign back in. When I signed back in, however, I was back to the "Sorry, we're having some trouble" message.

[rebron]

cc: @simonhong

[Brave-Matt]

Lots of discussion happening on Reddit -- 35+ comments
https://www.reddit.com/r/brave_browser/comments/anewog/cannot_get_xfinity_stream_to_work_in_brave/

[indyodie]

Same issue here: Version 0.68.132 Chromium: 76.0.3809.132 (Official Build) (64-bit)

[Brave-Matt]

Several users on Community reporting this (again):
https://community.brave.com/t/problem-with-flash-player-loading-running/78862/4

[Brave-Matt]

+1 from Community:
https://community.brave.com/t/flash-player-will-not-load-on-comcast-xfinity-tv-streaming-xfinity-com-stream/83172/4

[WiCarr]

Not really familiar with Brave - but saw this thread and have been looking at some similar issues - so just a couple things to check out:

Does Brave use Chromium's PPAPI integration of Flash? If so Flash DRM relies on the RLZ buildflag being enabled or otherwise unblocking the GetMachineIDAsync call in device_id_fetcher.cc (https://cs.chromium.org/chromium/src/chrome/browser/renderer_host/pepper/device_id_fetcher.cc?l=46) in order to perform the DRM individualization step.

There was also a regression in Chromium where the origin header for a CORS call was set to null that broke xfinity.com/stream scenarios if the "Out of Blink CORS" experiment was enabled (the default state): https://bugs.chromium.org/p/chromium/issues/detail?id=994461&can=1&q=xfinity&colspec=ID%20Pri%20M%20Stars%20ReleaseBlock%20Component%20Status%20Owner%20Summary%20OS%20Modified

[Brave-Matt]

+1 from community:
https://community.brave.com/t/problems-with-video-streaming-services-websites-while-using-brave/86664/7

[murphyd]

+1 -- Received input from the community that stated he could not stream from Xfinity.com. He turned on Flash.

Tried this myself -- turned on Flash in Brave 1.0 and went to Xfinity.com/stream and it continues to say "Let’s get your Adobe Flash Player up and running." but doesn't prompt for the install.

[dodossssssssss]

+1 -- just encountered this issue today, constantly being prompted to install flash with flash already allowed (On flash test sites it is not noticing flash being allowed either even when I allow it. Maybe its a pepper flash issue?). I did notice that I can still stream tv on other sites (such as espn.com and foxsports.com/live) with my xfinity account, the xfinity.com/stream app is the only site with the issue.

I was also never prompted for widevine on netflix or hulu (I installed brave a few days ago now).

Version 1.0.0 Chromium: 78.0.3904.97 (Official Build) (64-bit)