Hm, apparently we already do this, though I see nothing in meta/css/css-scoping/__dir__.ini enabling it...
smaug and jgraham pointed me to https://searchfox.org/mozilla-central/source/testing/profiles/prefs_general.js#68
I guess this is invalid then...
Status: NEW → RESOLVED
Last Resolved: 2 years ago
Resolution: --- → INVALID
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