Examine source code of WebWidgetizer

{
  "manifest_version": 3,
  "name": "WebWidgetizer",
  "version": "2.0.2",
  "description": "Opens specific links in a dedicated popup tab.",
  "author": "M.Šehić",
  "browser_specific_settings": {
    "gecko": {
      "id": "{2f00030f-9869-45d5-b8ce-11b5c01ded5c}",
      "strict_min_version": "109.0"
    }
  },
  "permissions": [
    "tabs",
    "activeTab",
    "storage",
    "contextMenus"
  ],
  "action": {
    "default_popup": "html/popup.html",
    "default_icon": {
      "16": "images/icon16.png",
      "48": "images/icon48.png",
      "128": "images/icon128.png"
    }
  },
  "commands": {
    "open_link_in_new_window": {
      "suggested_key": {
        "default": "Ctrl+Shift+Y"
      },
      "description": "Open link in new window"
    }
  },
  "options_ui": {
    "page": "html/options.html",
    "open_in_tab": true
  },
  "icons": {
    "16": "images/icon16.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "background": {
    "scripts": [
      "js/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://*/*",
        "http://*/*"
      ],
      "js": [
        "js/content.js"
      ]
    }
  ]
}