зеркало из https://github.com/mozilla/gecko-dev.git
b7d17c8e5b
Although the spec says absolute is allowed for top layer elements, and actually other values should be computed to absolute, but this is mostly fine because the only way we currently support for web content to use the top layer is via the Fullscreen API, however, fullscreen elements are forced to be fixed by the UA sheet. Given only fixed is safe for top layer element currently, rather than doing what the spec says, we should prefer always force it, until we really add support for the other value. --HG-- extra : source : 778b17ff659c0a392ead29afe7c0506acede5e6f |
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