Examine source code of SocialCleaner

{
  "manifest_version": 3,
  "name": "SocialCleaner",
  "version": "1.0.0",
  "description": "Bulk-delete all your posts on X (Twitter) and LinkedIn",
  "browser_specific_settings": {
    "gecko": {
      "id": "socialcleaner@brvier",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "activeTab",
    "scripting",
    "tabs",
    "storage"
  ],
  "host_permissions": [
    "https://x.com/*",
    "https://twitter.com/*",
    "https://www.linkedin.com/*"
  ],
  "background": {
    "scripts": [
      "background/service-worker.js"
    ],
    "type": "module"
  },
  "action": {
    "default_popup": "popup/popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "icons": {
    "16": "icons/icon-16.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://x.com/*",
        "https://twitter.com/*"
      ],
      "js": [
        "shared/constants.js",
        "content-scripts/x-deleter.js"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "https://www.linkedin.com/*"
      ],
      "js": [
        "shared/constants.js",
        "content-scripts/linkedin-deleter.js"
      ],
      "run_at": "document_idle"
    }
  ]
}