Examine source code of WishListo

{
  "manifest_version": 2,
  "name": "__MSG_manifest_name__",
  "description": "__MSG_manifest_description__",
  "version": "1.1.6",
  "default_locale": "en",
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_icon": {
      "19": "icon19.png",
      "38": "icon38.png"
    },
    "default_title": "__MSG_manifest_browser_action_title__",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.listesdecadeaux.com/*",
        "*://*.wishlisto.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end"
    }
  ]
}