Could you not use webNavigation[0] to check the url and permissions API to ask for permission[1] if necessary? EDIT: Or tabs.onUpdated if webNavigation doesn't

Could you not use webNavigation[0] to check the url and permissions API to ask for permission[1] if necessary? EDIT: Or tabs.onUpdated if webNavigation doesn't fire for hash changes[2] [0] https://developer.mozilla.org/en-US/Add-ons/WebExtensions/API/webNavigation https://developer.mozilla.org/en-US/Add-ons/WebExtensions/AP... [1] https://developer.mozilla.org/en-US/Add-ons/WebExtensions/API/permissions https://developer.mozilla.org/en-US/Add-ons/WebExtensions/AP... [2] https://developer.mozilla.org/en-US/Add-ons/WebExtensions/API/tabs/onUpdated https://developer.mozilla.org/en-US/Add-ons/WebExtensions/AP...