Examine source code of Medium Fixer

{
  "manifest_version": 2,
  "name": "Medium Fixer",
  "version": "1.3.3",
  "description": "Fixes Medium's annoying popups and makes it free.",
  "author": "Márk Munkácsi <munkacsimark@gmail.com> (https://codermark.dev)",
  "icons": {
    "16": "./assets/medium-fixer-logo-16.png",
    "48": "./assets/medium-fixer-logo-48.png",
    "128": "./assets/medium-fixer-logo-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "./content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "background": {
    "scripts": [
      "./background.js"
    ]
  },
  "permissions": [
    "*://*/*",
    "tabs",
    "cookies"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "medium-fixer@codermark.dev"
    }
  }
}