Thanks for the pref name. The feature is currently enabled by default only in the Firefox Nightly channel but you can use the pref to enable it in the Beta or R

Thanks for the pref name. The feature is currently enabled by default only in the Firefox Nightly channel but you can use the pref to enable it in the Beta or Release channels. https://bugzilla.mozilla.org/show_bug.cgi?id=1352014 https://bugzilla.mozilla.org/show_bug.cgi?id=1352014