Examine source code of Free Your Mind

{
  "manifest_version": 2,
  "name": "Free Your Mind",
  "version": "1.0.0",
  "description": "Blocks you from accessing porn sites and keeps you motivated",
  "author": "Funeoz",
  "homepage_url": "https://github.com/Funeoz/free-your-mind",
  "icons": {
    "16": "assets/img/icon16.png",
    "48": "assets/img/icon48.png",
    "128": "assets/img/icon128.png"
  },
  "permissions": [
    "tabs",
    "webRequest"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{71d25593-af97-4077-ac05-8dfe6020d8db}"
    }
  }
}