Examine source code of DOU Block List

{
  "name": "DOU Block List",
  "version": "3.0.0",
  "description": "Manage the Block List at https://dou.ua/forums",
  "permissions": [
    "https://dou.ua/forums/topic/*",
    "https://dou.ua/lenta/**/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://dou.ua/forums/topic/*",
        "https://dou.ua/lenta/**/*",
        "https://dou.ua/users/**/*"
      ],
      "js": [
        "extension.js"
      ],
      "css": [
        "styles.css"
      ]
    }
  ],
  "host_permissions": [],
  "manifest_version": 2
}