Examine source code of RefreshMe

{
  "manifest_version": 2,
  "name": "RefreshMe Vocab Helper",
  "version": "1.0",
  "description": "Sélectionne un mot et ajoute-le à RefreshMe en un clic.",
  "permissions": [
    "contextMenus",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "128": "icons/icon128.png"
    },
    "default_title": "Ajouter un mot à RefreshMe"
  },
  "icons": {
    "128": "icons/icon128.png"
  },
  "web_accessible_resources": [
    "login.html"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{16ed85fa-8eb2-42c3-93b4-5b1024b9abe8}"
    }
  }
}