Examine source code of CA auto pass

{
  "manifest_version": 2,
  "name": "CA auto pass",
  "version": "0.1.0",
  "description": "Tappe le mot de passe Credit Agricole automatiquement",
  "applications": {
    "gecko": {
      "strict_min_version": "57.0"
    }
  },
  "permissions": [
    "activeTab",
    "tabs",
    "storage",
    "contextMenus"
  ],
  "icons": {
    "32": "icons/favicon.png"
  },
  "page_action": {
    "browser_style": true,
    "default_icon": "icons/off.svg"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options/options.html"
  }
}