Firefox has 3 HTML parsers. One for HTML. One for (I think) XML/XHTML. One for about:blank.
Jake Archibald @jaffathecake
2 Nov 2017
The fact that about:blank, LITERALLY AN EMPTY PAGE, is full of weird edge cases, is the most 'web' thing.
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I thought the legacy parser had managed to be killed a year or two ago, and about:blank just used the normal one?
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No, the ghost if the old HTML parser is still there just for parsing about:blank. I view this as a failure of mine.
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Replying to @hsivonen @gsnedders @ManishEarth
The code has been somewhat simplified, though, such as searchfox.org/mozilla-centra…

Nov 3, 2017 · 8:20 PM UTC

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Replying to @davidbaron @hsivonen @gsnedders @ManishEarth
I have recently removed some stuff in parser/htmlparser/: bugzil.la/1400777 bugzil.la/1401097 bugzil.la/1402769
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Boy, all of that SAX stuff that's still around for a single user (FeedProcessor.js)?
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