Examine source code of GIFs for GitHub

{
  "$schema": "https://json.schemastore.org/chrome-manifest",
  "manifest_version": 2,
  "name": "GIFs for GitHub",
  "version": "26.5.28",
  "description": "Easily search and add a GIF into any GitHub comment box.",
  "options_ui": {
    "page": "options.html",
    "open_in_tab": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{443bc2e2-8fa9-44ec-828a-fd84c0664f8d}"
    }
  },
  "permissions": [
    "contextMenus",
    "activeTab",
    "storage",
    "https://api.klipy.com/*",
    "https://api.giphy.com/*"
  ],
  "icons": {
    "16": "images/icon16.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://github.com/*",
        "https://gist.github.com/*"
      ],
      "css": [
        "style.css"
      ],
      "js": [
        "main.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "images/*.png"
  ],
  "browser_action": {
    "default_icon": {
      "128": "images/icon128.png"
    }
  },
  "optional_permissions": [
    "http://*/*",
    "https://*/*",
    "<all_urls>"
  ]
}