Css Playground and Dom Tree

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Css Playground and Dom Tree",
  "version": "6.1.3",
  "description": "For Web designers, developers, web instructors. On live web pages, inspect, edit, and test hundreds of [new] CSS styles per second.",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "<all_urls>"
  ],
  "browser_action": {
    "default_icon": "icons/pine-tree-32.png",
    "default_title": "Css Playground",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content-script.js"
      ],
      "run_at": "document_idle",
      "all_frames": true
    }
  ],
  "icons": {
    "48": "icons/pine-tree-32.png"
  },
  "devtools_page": "devtools.html",
  "web_accessible_resources": [
    "icons/*.png",
    "images/*.gif",
    "images/*.jpg",
    "images/*.png"
  ]
}