Replace Missing Favicon

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Replace Missing Favicon",
  "version": "0.4.5",
  "description": "Provides a random gravatar for websites missing a favicon.",
  "page_action": {
    "default_icon": "replace_jinja_19.png",
    "default_title": "Replace Missing Favicon"
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "jquery-1.9.1.min.js",
        "jquery.md5.js",
        "URI.min.js",
        "contentscript.js"
      ],
      "run_at": "document_idle",
      "all_frames": false
    }
  ],
  "icons": {
    "48": "replace_jinja_48.png",
    "128": "replace_jinja_128.png"
  },
  "manifest_version": 2
}