Its used here: https://github.com/WebKit/WebKit/blob/dc1354a1d26db54d17f7d3989a81036a46ee2d60/Source/WebCore/loader/MixedContentChecker.cpp#L170C27-L170C55 http

Its used here: https://github.com/WebKit/WebKit/blob/dc1354a1d26db54d17f7d3989a81036a46ee2d60/Source/WebCore/loader/MixedContentChecker.cpp#L170C27-L170C55 https://github.com/WebKit/WebKit/blob/dc1354a1d26db54d17f7d3... Seems to be specifically for (not) upgrading images and videos from http to https, nothing else.