Examine source code of Text Spacing Editor

{
  "icons": {
    "16": "icon16.plasmo.2577fc03.png",
    "32": "icon32.plasmo.d583dc1e.png",
    "48": "icon48.plasmo.e0fcfb1d.png",
    "64": "icon64.plasmo.e6259081.png",
    "128": "icon128.plasmo.96a1ede9.png"
  },
  "manifest_version": 3,
  "action": {
    "default_icon": {
      "16": "icon16.plasmo.2577fc03.png",
      "32": "icon32.plasmo.d583dc1e.png",
      "48": "icon48.plasmo.e0fcfb1d.png",
      "64": "icon64.plasmo.e6259081.png",
      "128": "icon128.plasmo.96a1ede9.png"
    },
    "default_popup": "popup.html"
  },
  "version": "2.2.0",
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "background": {
    "scripts": [
      "background.a5c7ae1c.js"
    ]
  },
  "permissions": [
    "storage",
    "scripting"
  ],
  "default_locale": "en",
  "browser_specific_settings": {
    "gecko": {
      "id": "devs@actumdigital.com",
      "strict_min_version": "109.0"
    }
  },
  "host_permissions": [
    "https://*/*"
  ],
  "commands": {
    "toggle": {
      "suggested_key": {
        "windows": "Ctrl+Shift+F",
        "mac": "Command+Shift+F",
        "chromeos": "Ctrl+Shift+F",
        "linux": "Ctrl+Shift+F"
      },
      "description": "__MSG_toggleCommand__"
    }
  }
}