If your streaming software's implementation of browser source uses a build of CEF that is based on at least Chrome 49, chances are that NodeCG graphics will. Creating CasparCG templates in Adobe CC. So you can avoid areas likely to be hidden by player chrome or cropping. As this stream is HD.
If I look at for 3.2171.1979, it states that it should work: Re-implement off-screen rendering using the new delegated rendering approach (issue #1257). This implementation supports both GPU compositing and software compositing (used when GPU is not supported or when passing --disable-gpu --disable-gpu-compositing command-line flags). GPU-accelerated features (WebGL and 3D CSS) that did not work with the previous off-screen rendering implementation do work with this implementation when GPU support is available. The cefclient that comes along with CEF also works fine with webgl in offscreen mode. I will try tomorrow with the latest dev build of CEF to see if anything new could help on making it work in CasparCG.

If I look at for 3.2171.1979, it states that it should work: Re-implement off-screen rendering using the new delegated rendering approach (issue #1257). This implementation supports both GPU compositing and software compositing (used when GPU is not supported or when passing --disable-gpu --disable-gpu-compositing command-line flags). GPU-accelerated features (WebGL and 3D CSS) that did not work with the previous off-screen rendering implementation do work with this implementation when GPU support is available. The cefclient that comes along with CEF also works fine with webgl in offscreen mode.
I will try tomorrow with the latest dev build of CEF to see if anything new could help on making it work in CasparCG. WebGL worked (Stable 60 FPS) command line: casparcg.exe casparcg.config --enable-gpu-rasterization --gpu-rasterization-msaa-sample-count=16 --enable-gpu --enable-gpu-compositing --enable-begin-frame-scheduling [2016-03-12 21:53:27.795] [22316] [info] cef.version 3.2641.1390 [2016-03-12 21:53:27.797] [22316] [info] cef.chromeversion 50.0.2641.0 Latest CEF: Test build - upd. Files updated for support proprietary codecs. CEF build args: set GYP_MSVS_VERSION=2015 set GYP_GENERATORS=ninja,msvs-ninja set GYP_DEFINES=buildtype=Official optimize=max target_arch=x64 proprietary_codecs=1 ffmpeg_branding=Chrome. WebGL worked (Stable 60 FPS) command line: casparcg.exe casparcg.config --enable-gpu-rasterization --gpu-rasterization-msaa-sample-count=16 --enable-gpu --enable-gpu-compositing --enable-begin-frame-scheduling [2016-03-12 21:53:27.795] [22316] [info] cef.version 3.2641.1390 [2016-03-12 21:53:27.797] [22316] [info] cef.chromeversion 50.0.2641.0 Latest CEF: Test build - upd. Files updated for support proprietary codecs. CEF build args: set GYP_MSVS_VERSION=2015 set GYP_GENERATORS=ninja,msvs-ninja set GYP_DEFINES=buildtype=Official optimize=max target_arch=x64 proprietary_codecs=1 ffmpeg_branding=Chrome.
It produces one of these every 5-7ms: [2016-12-05 11:05:21.207] [2272] [fatal] ####################### [2016-12-05 11:05:21.207] [2272] [fatal] UNHANDLED EXCEPTION: [2016-12-05 11:05:21.207] [2272] [fatal] Adress:000007FEE30B08BD [2016-12-05 11:05:21.207] [2272] [fatal] Code: [2016-12-05 11:05:21.207] [2272] [fatal] Flag:0 [2016-12-05 11:05:21.207] [2272] [fatal] Info:000000000AFADFD0 [2016-12-05 11:05:21.207] [2272] [fatal] Continuing execution. It produces one of these every 5-7ms: [2016-12-05 11:05:21.207] [2272] [fatal] ####################### [2016-12-05 11:05:21.207] [2272] [fatal] UNHANDLED EXCEPTION: [2016-12-05 11:05:21.207] [2272] [fatal] Adress:000007FEE30B08BD [2016-12-05 11:05:21.207] [2272] [fatal] Code: [2016-12-05 11:05:21.207] [2272] [fatal] Flag:0 [2016-12-05 11:05:21.207] [2272] [fatal] Info:000000000AFADFD0 [2016-12-05 11:05:21.207] [2272] [fatal] Continuing execution.
Some error: [2016-12-05 17:15:19.637] [15012] [info] Initialized screen module. [2016-12-05 17:15:19.640] [9684] [fatal] ####################### [2016-12-05 17:15:19.640] [9684] [fatal] UNHANDLED EXCEPTION: [2016-12-05 17:15:19.640] [9684] [fatal] Adress:00007FFCAF1608BD [2016-12-05 17:15:19.640] [9684] [fatal] Code: [2016-12-05 17:15:19.640] [9684] [fatal] Flag:0 [2016-12-05 17:15:19.640] [9684] [fatal] Info:000000DD26AFDED0 [2016-12-05 17:15:19.640] [9684] [fatal] Continuing execution. Some error: [2016-12-05 17:15:19.637] [15012] [info] Initialized screen module.
[2016-12-05 17:15:19.640] [9684] [fatal] ####################### [2016-12-05 17:15:19.640] [9684] [fatal] UNHANDLED EXCEPTION: [2016-12-05 17:15:19.640] [9684] [fatal] Adress:00007FFCAF1608BD [2016-12-05 17:15:19.640] [9684] [fatal] Code: [2016-12-05 17:15:19.640] [9684] [fatal] Flag:0 [2016-12-05 17:15:19.640] [9684] [fatal] Info:000000DD26AFDED0 [2016-12-05 17:15:19.640] [9684] [fatal] Continuing execution.