Examine source code of XKCDo

{
  "description": "Adds the title text of the comic and a link to the explanation on explainxkcd.com for every xkcd comic",
  "manifest_version": 2,
  "name": "XKCDo",
  "version": "1.1.0",
  "homepage_url": "https://github.com/YasenPetrov/xkcdo",
  "icons": {
    "48": "icons/xkcdo.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://xkcd.com/*"
      ],
      "js": [
        "explain.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "strict_min_version": "84.0",
      "id": "{2453edab-3594-4e6f-af6b-1cee9666ba8d}"
    }
  }
}