Examine source code of New Window CSS Editor

{
  "manifest_version": 2,
  "name": "Inline CSS Editor",
  "version": "1.1",
  "description": "Edit CSS in a separate window and apply changes inline. Now with autocomplete!",
  "permissions": [
    "activeTab",
    "storage",
    "tabs"
  ],
  "icons": {
    "128": "assets/icon128.jpg"
  },
  "browser_action": {
    "default_title": "CSS Editor",
    "default_icon": {
      "128": "assets/icon128.jpg"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content-script.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{e054a8cc-5c3d-486b-bc63-2a30c13c5ef7}"
    }
  }
}