Examine source code of Word Replacer: Rules & Regex

{
  "manifest_version": 3,
  "name": "Word Replacer: Rules & Regex",
  "version": "1.0.1",
  "description": "Rewrite words and phrases on any page with your own find-and-replace rules — literal or regex, per-site, instantly.",
  "browser_specific_settings": {
    "gecko": {
      "id": "word-replacer@dermaxiaufgit.github.io",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "storage",
    "tabs",
    "contextMenus",
    "activeTab"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_title": "Word Replacer",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start",
      "all_frames": true,
      "match_about_blank": false
    }
  ],
  "commands": {
    "toggle-enabled": {
      "suggested_key": {
        "default": "Alt+Shift+R"
      },
      "description": "Toggle Word Replacer on/off"
    }
  }
}