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A comment on Thunderbird’s New Home. Parent comment

Re:Thunderbird’s New Home by SkyMarshal on Tuesday January 28, 2020 @03:06PM (#22173519)
I thought XUL was gone with the recent change to the way addons work in Firefox?
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Re:Thunderbird’s New Home by thenewnewguy on Tuesday January 28, 2020 @03:41PM (#22173811)
XUL is no longer exposed to plugins (in non-ESR FF), but is still used internally in some places - where it is slowly being replaced.
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Re:Thunderbird’s New Home by lowflyer on Tuesday January 28, 2020 @03:13PM (#22173577)
XUL was used all over the place, so it takes a while to fully remove it. Thunderbird updates the underlying platform only once per year, catching up with Firefox changes in the yearly major release, while Firefox does so every few weeks.
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Re:Thunderbird’s New Home by jcranmer on Tuesday January 28, 2020 @03:54PM (#22173925)
That's not quite accurate. Thunderbird develops its software with the tip-of-trunk Firefox code at all times. It only makes releases much less frequently than Firefox.
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Re:Thunderbird’s New Home by adrianmalacoda on Wednesday January 29, 2020 @01:54PM (#22184418)
It was XBL (XML Binding Language)[0] that was removed, not XUL - which is being phased out and replaced with HTML where appropriate.

0: https://briangrinstead.com/blog/xbl-in-firefox/

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