2021-01-06 UTC
# 
Zegnat aaronpk, [grantcodes], the spec was being written as the API was being implemented in Chromium / Firefox. All of them are pretty close. This is why MDN shows single compatibility tables at the bottom of their documentation pages. Random example: https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/tabs/remove#browser_compatibility