I am going through through some reading material and it felt odd that Apple is slowly making it hard to make browser extensions without having an Apple device when there are existing browser extension APIs being supported (with implementation differences) in all other major browsers: <a href="https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/Build_a_cross_browser_extension" rel="nofollow">https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/Web...</a><p>Browser extensions are mainly HTML, CSS, JavaScript apps, they should be more cross platform IMHO.