Examine source code of Cocktel

{
  "manifest_version": 2,
  "name": "Cocktel",
  "version": "1.16",
  "description": "Permet de faire des appels depuis cocktel vers des numéros de téléphone présents sur des pages web",
  "browser_specific_settings": {
    "gecko": {
      "id": "addon@cocktel.fr"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "128": "icons/icon128.png"
  },
  "background": {
    "page": "background.html"
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png"
    },
    "default_title": "Cocktel",
    "default_popup": "popup.html"
  },
  "commands": {
    "toggle-feature": {
      "suggested_key": {
        "default": "Ctrl+Shift+Space"
      },
      "description": "Ouvre le panneau Cocktel"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "page.js",
        "lib/cocktel.js",
        "lib/user.js",
        "lib/extension.js",
        "lib/call.js",
        "lib/annuaire.js",
        "lib/contact.js",
        "lib/sms.js",
        "lib/notifs.js"
      ],
      "css": [
        "cocktel.css",
        "api.css"
      ],
      "all_frames": true
    }
  ],
  "options_ui": {
    "page": "options.html"
  },
  "web_accessible_resources": [
    "lib/cocktel.js",
    "lib/user.js",
    "lib/extension.js",
    "lib/annuaire.js",
    "lib/call.js",
    "lib/sms.js",
    "images/*"
  ],
  "permissions": [
    "cookies",
    "<all_urls>",
    "storage",
    "notifications",
    "tabs",
    "contextMenus",
    "history"
  ]
}