XKCD Hovertext

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "XKCD Hovertext",
  "description": "This extension replaces native browser title text with a customizable popup for xkcd images.",
  "version": "1.6.1",
  "background": {
    "scripts": [
      "options.js",
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "js": [
        "jquery.min.js",
        "xkcdhovertext.js"
      ],
      "css": [
        "xkcdhovertext.css"
      ],
      "matches": [
        "https://xkcd.com/*",
        "https://xkcd.org/*",
        "https://xkcd.net/*",
        "https://www.xkcd.com/*",
        "https://www.xkcd.org/*",
        "https://www.xkcd.net/*",
        "https://what-if.xkcd.com/*"
      ],
      "run_at": "document_end"
    }
  ],
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "options_page": "options.html"
}