Examine source code of Redact

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "author": "forestbeasts",
  "version": "1.1.0",
  "default_locale": "en",
  "browser_specific_settings": {
    "gecko": {
      "id": "redact@ffextensions.brightfur.net"
    }
  },
  "icons": {
    "32": "redact-icon.svg"
  },
  "permissions": [
    "menus",
    "scripting",
    "activeTab",
    "storage"
  ],
  "background": {
    "scripts": [
      "redact.js"
    ]
  },
  "options_ui": {
    "page": "settings/settings.html"
  }
}