Examine source code of Zero Recs

{
  "manifest_version": 2,
  "name": "Zero Recs",
  "version": "0.0.4",
  "description": "Block all algorithm-recommended content on supported sites.",
  "browser_specific_settings": {
    "gecko": {
      "id": "zerorecs@ichaelm.com",
      "strict_min_version": "115.0"
    },
    "gecko_android": {
      "strict_min_version": "121.0"
    }
  },
  "icons": {
    "16": "images/icon-16.png",
    "32": "images/icon-32.png",
    "48": "images/icon-48.png",
    "96": "images/icon-96.png",
    "128": "images/icon-128.png"
  },
  "content_scripts": [
    {
      "js": [
        "scripts/old-reddit.js"
      ],
      "matches": [
        "https://old.reddit.com/*"
      ]
    },
    {
      "js": [
        "scripts/www-reddit.js"
      ],
      "run_at": "document_start",
      "all_frames": true,
      "matches": [
        "https://www.reddit.com/*"
      ]
    },
    {
      "js": [
        "scripts/www-youtube.js"
      ],
      "run_at": "document_start",
      "all_frames": true,
      "matches": [
        "https://www.youtube.com/*"
      ]
    },
    {
      "js": [
        "scripts/m-youtube.js"
      ],
      "run_at": "document_start",
      "all_frames": true,
      "matches": [
        "https://m.youtube.com/*"
      ]
    }
  ]
}