Examine source code of RHS Link Shortener

{
  "manifest_version": 3,
  "name": "RHS Link Shortener",
  "version": "1.0",
  "description": "Sends the current page's URL to the RHS Redirector to create a short link.",
  "permissions": [
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png"
    },
    "default_title": "Create RHS Short Link"
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "link-shortener@rhs.umd.edu",
      "strict_min_version": "109.0"
    }
  }
}