Examine source code of Article Finder

{
  "manifest_version": 2,
  "name": "Your Extension Name",
  "version": "1.0",
  "permissions": [
    "activeTab",
    "scripting"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "https://pubmed.ncbi.nlm.nih.gov/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{1539324e-91aa-4caf-9186-ce2bcd5db2fb}"
    }
  }
}