Examine source code of GitHub Contribution Graph

{
  "manifest_version": 3,
  "name": "GitHub Contribution Graph",
  "version": "1.3.0",
  "description": "View your GitHub contribution graph directly from the browser toolbar. Quickly check your daily contributions and yearly activity without leaving your current tab.",
  "author": "Aaron Feledy",
  "homepage_url": "https://github.com/aaronfeledy/github-contrib-graph",
  "browser_specific_settings": {
    "gecko": {
      "id": "github-contrib-graph@aaronfeledy.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://github.com/*"
  ],
  "action": {
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png"
    },
    "default_title": "GitHub Contributions",
    "default_popup": "popup/popup.html"
  },
  "background": {
    "scripts": [
      "background/background.js"
    ]
  },
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "options_ui": {
    "page": "options/options.html"
  }
}