Here's a discussion of doing that for V2: https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/Build_a_cross_browser_extension https://develo

Here's a discussion of doing that for V2: https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/Build_a_cross_browser_extension https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/Web... To your point, the Orion webkit-based browser for MacOS supports both: https://browser.kagi.com/ https://browser.kagi.com/ AFAIK, the only webkit browser to do so.