Examine source code of GoogleMapsNotesFix

{
  "manifest_version": 2,
  "name": "GoogleMapsNotesFix",
  "version": "1.0",
  "description": "Repairs the notes feature on google maps",
  "icons": {
    "48": "./gs-logo.png"
  },
  "web_accessible_resources": [
    "/html/controls.html"
  ],
  "browser_action": {
    "browser_style": false,
    "default_icon": "./gs-logo.png",
    "default_title": "Google Sucks",
    "default_popup": "./controls.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.google.com/maps/dir/*"
      ],
      "js": [
        "./index.js"
      ],
      "css": [
        "./index.css"
      ]
    }
  ],
  "permissions": [
    "storage",
    "<all_urls>"
  ]
}