Examine source code of CP Submit

{
  "name": "CP Submit",
  "author": "biswas.ayush03@gmail.com",
  "homepage_url": "https://github.com/tsych0/cp-submit",
  "version": "1.0.0",
  "description": "Codeforces and Atcoder Submit add-on for Competitive Programming Helper.",
  "icons": {
    "48": "icon-48.png"
  },
  "manifest_version": 2,
  "background": {
    "scripts": [
      "dist/backgroundScript.js"
    ]
  },
  "permissions": [
    "scripting",
    "*://localhost/*",
    "*://codeforces.com/*",
    "webNavigation"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{0f51d8b4-cbb5-4cc3-b873-1e37d9d330d0}",
      "strict_min_version": "102.0"
    }
  }
}