Examine source code of Favicon Switcher

{
  "manifest_version": 2,
  "name": "FaviconSwitcher",
  "version": "0.4.0",
  "description": "Replace ugly favicon by uploading your own images.",
  "icons": {
    "512": "icons/icon.png"
  },
  "browser_action": {
    "default_icon": {
      "512": "icons/icon.png"
    },
    "default_title": "Favicon Switcher",
    "default_popup": "src/popup/popup.html",
    "browser_style": true
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "src/indexedDBWrapper.js",
        "favicon_switcher.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "src/indexedDBWrapper.js",
      "background.js"
    ]
  },
  "permissions": [
    "tabs",
    "notifications",
    "activeTab",
    "storage"
  ],
  "web_accessible_resources": [
    "src/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{1220100b-db8f-419f-9cd4-ed7a51cee7f3}"
    }
  }
}