Examine source code of CodeSynapse

{
  "manifest_version": 3,
  "name": "CodeSynapse",
  "version": "2.0",
  "description": "Track solved problems by rating and date, and automatically sync your accepted Codeforces solutions to a GitHub repository.",
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://codeforces.com/*",
    "https://api.github.com/*"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "icons": {
    "16": "img/icon16.png",
    "32": "img/icon32.png",
    "48": "img/icon64.png",
    "128": "img/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://codeforces.com/*"
      ],
      "js": [
        "libs/chart.umd.min.js",
        "libs/chartjs-plugin-datalabels.min.js",
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "codesynapse@outlook.com"
    }
  },
  "web_accessible_resources": [
    {
      "resources": [
        "icon.png"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ]
}