Examine source code of DMOJ Rating Predictor

{
  "name": "DMOJ Rating Predictor",
  "version": "1.0.5",
  "manifest_version": 2,
  "description": "An extension which shows rating changes next to DMOJ contest rankings.",
  "homepage_url": "https://dmoj.ca",
  "icons": {
    "32": "icons/32.png",
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "permissions": [
    "storage",
    "https://evanzhang.ca/",
    "https://dmoj.ca/"
  ],
  "incognito": "spanning",
  "options_ui": {
    "page": "src/main.html"
  },
  "browser_action": {
    "default_title": "DMOJ Rating Predictor",
    "default_popup": "src/main.html"
  },
  "background": {
    "scripts": [
      "src/js/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://dmoj.ca/contest/*/ranking/",
        "https://dmoj.ca/users/"
      ],
      "css": [
        "src/css/predictor.css"
      ],
      "js": [
        "src/vendor/jquery-3.4.1.min.js",
        "src/js/common.js",
        "src/js/predictor.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{a7e114e0-0ab5-49b4-b67d-34612d12249d}"
    }
  }
}