Examine source code of Ragtag Browser Extension

{
  "manifest_version": 3,
  "name": "RagTag Browser Extension",
  "author": "PhoenixC",
  "version": "0.0.2",
  "description": "",
  "icons": {
    "16": "assets/icon_16.png",
    "19": "assets/icon_19.png",
    "32": "assets/icon_32.png",
    "38": "assets/icon_38.png",
    "48": "assets/icon_48.png"
  },
  "action": {
    "default_popup": "html/popup.html",
    "default_icon": {
      "16": "assets/icon_16.png",
      "19": "assets/icon_19.png",
      "32": "assets/icon_32.png",
      "38": "assets/icon_38.png",
      "48": "assets/icon_48.png"
    }
  },
  "permissions": [
    "activeTab",
    "webRequest",
    "contextMenus",
    "bookmarks",
    "scripting"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "css": [],
      "js": [
        "js/browser-polyfill.js",
        "js/content.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "js/browser-polyfill.js",
      "js/background.js"
    ]
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self';"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{10d9b8c2-9723-4a34-a8d0-5d6c9f6e9615}",
      "strict_min_version": "113.0"
    },
    "gecko_android": {
      "id": "{10d9b8c2-9723-4a34-a8d0-5d6c9f6e9615}",
      "strict_min_version": "113.0"
    }
  }
}