Examine source code of Novel Name Replacer

{
  "manifest_version": 2,
  "name": "Novel Name Replacer",
  "version": "1.3.0",
  "description": "Replace character names in novels and fanfiction on any website",
  "permissions": [
    "storage",
    "activeTab",
    "<all_urls>"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end"
    },
    {
      "matches": [
        "about:reader*"
      ],
      "js": [
        "reader.js"
      ],
      "run_at": "document_end"
    }
  ],
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "name-replacer@extension.local",
      "strict_min_version": "79.0"
    }
  }
}