Examine source code of ProTrombine

{
  "manifest_version": 2,
  "name": "ProTrombine",
  "version": "2.2022",
  "description": "Permet de jouer avec les trombinoscopes sous Pronote web",
  "icons": {
    "48": "icon.svg",
    "96": "icon.svg"
  },
  "applications": {
    "gecko": {
      "id": "protrombine@lyceejeanbart.fr"
    }
  },
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_icon": "icon.svg",
    "default_title": "ProTrombine",
    "default_popup": "choix_protrombine.html"
  }
}