Roc wrote up a proposal last year for a web-facing screen capture API:
https://wiki.mozilla.org/User:Roc/ScreenCaptureAPI

Even if not web-facing, we could use the implementation code to cover chrome 
use cases like this one:
https://bugzilla.mozilla.org/show_bug.cgi?id=933389

At a recent GFx/Layout work week, we discussed using the Compositor to extract 
the screen-grab in an efficient, cross-platform manner. It seems we've got 
enough infrastructure in place to implement this quickly.

I'd like options on the API to allow for obscuring text layers so that we could 
use the images for UI tiles, and other privacy-sensitive use cases.

Kicking off this thread to get a discussion on:

1. Web-facing or not?
2. Security/Privacy concerns
3. Implementation concerns
4. Feature requests (eg. blurred or lorem-ipsum text)

Other ideas?

--Jet
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