Examine source code of Delocalizer

{
  "name": "Delocalizer",
  "description": "__MSG_extDescription__",
  "version": "0.0.1",
  "icons": {
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "manifest_version": 2,
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "storage",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  },
  "browser_action": {
    "default_icon": "icons/128.png",
    "default_popup": "popup.html",
    "browser_style": true
  },
  "default_locale": "en",
  "browser_specific_settings": {
    "gecko": {
      "id": "{938b3396-e36f-449f-bc63-af9d96cd094c}"
    }
  }
}