Examine source code of Favoris Manager

{
  "manifest_version": 2,
  "name": "Favoris Manager",
  "version": "1.2",
  "description": "Ajouter des liens de la barre d'adresse dans une liste de favoris.",
  "permissions": [
    "activeTab",
    "storage",
    "tabs"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icons/star-48.png"
    }
  },
  "icons": {
    "48": "icons/star-48.png"
  },
  "incognito": "spanning",
  "browser_specific_settings": {
    "gecko": {
      "id": "{daeeb24b-adb7-408e-931d-9c921770df7a}"
    }
  }
}