Here are my personal comments on the document:
1. Overall, it's a good a light document. I agree the feature is needed.
2. I don't understand why this is restricted to Widgets...
A HTML page can be dropped on a desktop or be rendered chromeless
by Mozilla Prism. A web page can be rendered in a browser in
fullscreen mode, etc. All values still make sense in the case of
a browser.
I think this spec should be made app-agnostic and Widgets should not
be the only target.
3. why "maxiMIZED" and only "mini"?
4. I think a "hidden" value makes sense for future system use of
webapps... Don't say no immediately and think more about it please.
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