Examine source code of exinfo

{
  "manifest_version": 2,
  "version": "1.0.4resigned1",
  "short_name": "Exinfo",
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "default_locale": "ru",
  "icons": {
    "16": "images/icons/16.png",
    "48": "images/icons/48.png",
    "128": "images/icons/128.png"
  },
  "applications": {
    "gecko": {
      "id": "jid1-4XGffJomp5fyjw@jetpack"
    }
  },
  "browser_action": {
    "default_icon": {
      "19": "images/buttons/19/default.png",
      "38": "images/buttons/38/default.png"
    },
    "default_title": "__MSG_defaultTitle__"
  },
  "background": {
    "scripts": [
      "scripts/index.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "scripts/check.js"
      ],
      "run_at": "document_start"
    }
  ],
  "permissions": [
    "tabs",
    "http://api.kurses.com.ua/*"
  ]
}