Examine source code of Stray Kitty

{
  "manifest_version": 2,
  "name": "Stray Kitty",
  "description": "A browser kitty toy",
  "version": "1.1.0",
  "browser_action": {
    "browser_style": true,
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "16": "icon-16.png",
    "48": "icon-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "straykitty-webextension.js"
      ]
    }
  ],
  "permissions": [
    "tabs",
    "webNavigation"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{2fbfe101-aa36-4cd9-98cc-0c2a191f8b47}"
    }
  },
  "web_accessible_resources": [
    "kitties.png"
  ]
}