Firefox 122 supports page-orientation
descriptor for the @page
at-rule
#25299
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The
page-orientation
descriptor was enabled in FF122 in https://bugzilla.mozilla.org/show_bug.cgi?id=1869880 - as you can see fromlayout.css.page-orientation.enabled
value in https://searchfox.org/mozilla-central/source/modules/libpref/init/StaticPrefList.yaml#9475This fell out of checks in mdn/content#36742