Examine source code of Single Emoji

{
  "name": "Single Emoji",
  "manifest_version": 2,
  "version": "1.0.25",
  "permissions": [
    "storage",
    "https://github.com/*",
    "https://*.github.com/*",
    "https://single-emoji.vercel.app/*"
  ],
  "options_ui": {
    "page": "options.html"
  },
  "background": {
    "scripts": [
      "service-worker.global.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.github.com/*",
        "https://github.com/*"
      ],
      "js": [
        "github-init.global.js"
      ]
    },
    {
      "matches": [
        "https://single-emoji.vercel.app/*"
      ],
      "all_frames": true,
      "js": [
        "dashboard-init.global.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "github-fetch-inject.global.js",
    "dashboard-init-script.global.js"
  ],
  "content_security_policy": "default-src 'self'; connect-src https://* data: blob: filesystem:;",
  "browser_specific_settings": {
    "gecko": {
      "id": "{e23d8cd8-aaf6-4857-9e46-326acefc842d}"
    }
  }
}