Examine source code of Cleaner And Helper

{
  "name": "Cleaner And Helper",
  "version": "1.4.3",
  "description": "Prevents annoying advertisements and improves convenience, designed for Netfree users.",
  "manifest_version": 3,
  "icons": {
    "16": "media2/16.png",
    "48": "media2/32.png",
    "128": "media2/128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.jdn.co.il/*"
      ],
      "run_at": "document_start",
      "js": [
        "general-mutation.js",
        "jdn.js"
      ]
    },
    {
      "matches": [
        "*://hm-news.co.il/*"
      ],
      "run_at": "document_start",
      "js": [
        "general-mutation.js",
        "hm-news.js"
      ]
    },
    {
      "matches": [
        "*://www.kore.co.il/*"
      ],
      "run_at": "document_start",
      "js": [
        "general-mutation.js",
        "kore.js"
      ]
    },
    {
      "matches": [
        "*://www.kore.co.il/flashNews*"
      ],
      "run_at": "document_start",
      "js": [
        "kore-flashNews.js"
      ],
      "css": [
        "kore-flashNews.css"
      ]
    },
    {
      "matches": [
        "*://www.bahazit.co.il/*"
      ],
      "run_at": "document_start",
      "js": [
        "general-mutation.js",
        "bahazit.js"
      ]
    },
    {
      "matches": [
        "*://www.prog.co.il/*"
      ],
      "run_at": "document_start",
      "js": [
        "general-mutation.js",
        "prog.js"
      ],
      "css": [
        "prog.css"
      ]
    },
    {
      "matches": [
        "*://kcm.fm/*"
      ],
      "run_at": "document_idle",
      "js": [
        "kcm.js"
      ]
    },
    {
      "matches": [
        "*://www.hidabroot.org/*"
      ],
      "run_at": "document_start",
      "js": [
        "general-mutation.js",
        "hidabroot.js"
      ],
      "css": [
        "prog.css"
      ]
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "kcm-em.js"
      ],
      "matches": [
        "https://kcm.fm/*"
      ]
    }
  ],
  "declarative_net_request": {
    "rule_resources": [
      {
        "id": "ruleset_1",
        "enabled": true,
        "path": "rules.json"
      }
    ]
  },
  "permissions": [
    "declarativeNetRequest",
    "declarativeNetRequestWithHostAccess"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "cleanerAndHelperExtension@yossizahn.tech"
    }
  }
}