Examine source code of TILTension

{
  "name": "TILTension",
  "description": "A Firefox extension for TILT",
  "version": "1.1",
  "manifest_version": 2,
  "content_scripts": [
    {
      "matches": [
        "*://*.google.com/*",
        "*://*.google.de/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "css/style.css"
      ]
    }
  ],
  "action": {
    "default_icons": {
      "16": "images/green_icon_16.png",
      "32": "images/green_icon_32.png"
    },
    "default_title": "TILTension"
  },
  "web_accessible_resources": [
    "tiltdb.json",
    "images/*.png",
    "images/cristiroma_countries_data_flags_SVG/*.svg"
  ],
  "icons": {
    "16": "images/green_icon_16.png",
    "32": "/images/green_icon_32.png",
    "128": "/images/green_icon_128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0b0451ca-6677-4dae-863a-261c2f7894d1}"
    }
  }
}