https://bugzilla.mozilla.org/show_bug.cgi?id=1824115
1824115 - Allow getLabel function of action APIs to return null
RESOLVED (john) in Thunderbird - Add-Ons: Extensions API. Last updated 2023-03-23.
action apisallowgetlabelfunctionreturn
https://lists.w3.org/Archives/Public/public-pfwg/2015Mar/0256.html
Re: ACTION-1279: Talk to mobile manufacturers about how to include their apis from Richard...