Restyler

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Restyler",
  "description": "A devtool extension for easy restyling of any webpage",
  "version": "1.2.1",
  "minimum_chrome_version": "30.0",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "devtools_page": "html/devtool/devtoolLoader.html",
  "background": {
    "scripts": [
      "js/background/background.min.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "css": [
        "stylesheets/content_scripts/content_script.css"
      ],
      "js": [
        "js/content_scripts/vendor/jquery-3.1.0.js",
        "js/content_scripts/core/restyler.min.js",
        "js/content_scripts/content_script.min.js"
      ],
      "run_at": "document_end",
      "all_frames": true
    }
  ],
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self'",
  "permissions": [
    "<all_urls>",
    "tabs"
  ]
}