Hello, I am the developer of the "FlagCookies" - add-on: https://addons.mozilla.org/de/firefox/addon/flag-cookies/ I would like to make a request to include "window id" and "tab id" in the cookie "onCookieChanged" -Event triggered dynamically. At the present state it is not possible to identify where a cookie is originating from, only the "cookies.cookie" values, but no values for "Window" and "Tab Id" which would dramatically help to assign a cookie to a particular domain even if the "cookie.originURL" or "cookie.url" is different from the surfed on website. As an example, you can visit "https://freenet.de" which loads different ad trackers - which cookies are displayed as "Cross Origin" in Flag Cookies. A screenshot is attached. In case you need clarification or more information, please let me know.