Examine source code of PubMed Search Engine

{
  "manifest_version": 2,
  "name": "PubMed Search Engine",
  "description": "Adds the PubMed search engine to the search and address bars.",
  "developer": {
    "name": "TobiWan54",
    "url": "https://github.com/TobiWan54/pubmed-search-engine-firefox"
  },
  "version": "1.0",
  "chrome_settings_overrides": {
    "search_provider": {
      "name": "PubMed",
      "search_url": "https://pubmed.ncbi.nlm.nih.gov/?term={searchTerms}",
      "keyword": "pubmed",
      "favicon_url": "icons/48.png",
      "is_default": false,
      "encoding": "UTF-8"
    }
  },
  "permissions": [
    "contextMenus"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "16": "icons/16.png",
    "24": "icons/24.png",
    "32": "icons/32.png",
    "48": "icons/48.png"
  },
  "web_accessible_resources": [
    "icons/48.png"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{f89bb5a4-8e35-447d-9974-d9b3ad2bd270}"
    }
  }
}