LGTM1
 

Interoperability risk is relatively low. The main risk is that other 
browsers do not implement the feature. However, since the feature is a 
small addition to an existing spec and it has consensus across browsers, it 
is possible that it will be implemented. There is no compatibility risk as 
the feature is strictly additive and orthogonal to existing features.

I assume that this can be feature detected (as presence or absence of the 
information) and in non-supporting browsers, the app would fall back to 
whatever the current behavior is. Is that a reasonable approach for 
developers?



*Gecko*: Positive (https://github.com/w3c/mediacapture-screen-share/pull/315) 
Since this is a minor addition to an existing spec, no official position 
was requested as it would have been closed without response. The provided 
link points to the PR where Firefox's representative was supportive. 

*WebKit*: Positive (https://github.com/w3c/mediacapture-screen-share/
pull/315) Since this is a minor addition to an existing spec, no official 
position was requested as it would have been closed without response. The 
provided link points to the PR where Safari's representative approved.


I would typically err on the side of filing a position request regardless 
of the size of the feature. I don't believe it's common that these would be 
closed without a response. However, in this specific case I agree that the 
approval and comments on the pull request seem to be sufficient evidence of 
support.
 
Thanks,
Vlad

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