Examine source code of Qwopy

{
  "action": {
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "author": "Polymer Mallard",
  "browser_specific_settings": {
    "gecko": {
      "id": "extension.qwopy@polymermallard.com"
    }
  },
  "content_scripts": [
    {
      "all_frames": true,
      "js": [
        "shared/script/app/app.js"
      ],
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_end"
    }
  ],
  "description": "Allows user to copy primary article text by pressing and holding the mouse.",
  "homepage_url": "https://www.polymermallard.com",
  "host_permissions": [
    "<all_urls>"
  ],
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "manifest_version": 3,
  "name": "Qwopy",
  "permissions": [
    "activeTab"
  ],
  "version": "0.1.6",
  "web_accessible_resources": []
}