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A comment on After fifteen years of downtime, the MetaFilter gopher server is back. Parent comment

Re:After fifteen years of downtime, the MetaFilter gopher se... by mintplant on Friday February 26, 2016 @06:20PM (#11185036)
You're correct, the browser extracts and reformats the content. Firefox only shows the Reader View icon for pages where it thinks it can do a good job of that.
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Re:After fifteen years of downtime, the MetaFilter gopher se... by digi_owl on Friday February 26, 2016 @11:29PM (#11186061)
I find myself wondering if it relies on the "for printing" reformating of various sites. This because i was browsing one site i could have sworn had the icon earlier using desktop Firefox, but it didn't show up. That is until i enable the JS of s third party printing framework in Noscript. After that it showed up.
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Re:After fifteen years of downtime, the MetaFilter gopher se... by mintplant on Saturday February 27, 2016 @12:49AM (#11186229)
It's using this code:

https://github.com/mozilla/readability/blob/master/Readabili...

which is a descendant of the original Readability.js published by Arc90, before they decided to turn it into a proprietary Instapaper clone.

It extracts what looks like article text from the page markup. DOM elements included for a printer-friendly view could possibly be helping, but it doesn't target that directly.

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