Translations:Mozilla Firefox/20/en
From Manjaro
replace:
Exec=/usr/lib/firefox/firefox %u
with:
Exec=/usr/bin/sh -c "GTK_USE_PORTAL=1 /usr/lib/firefox/firefox %u"
replace:
Exec=/usr/lib/firefox/firefox %u
with:
Exec=/usr/bin/sh -c "GTK_USE_PORTAL=1 /usr/lib/firefox/firefox %u"