Examine source code of Library Proxy DOI

{
  "manifest_version": 2,
  "name": "Library Proxy DOI",
  "version": "1.0",
  "description": "Automatically connects to a webpage using Vanderbilt's library system as an access proxy.",
  "homepage_url": "https://github.com/kbvatral/LibraryProxyDOI",
  "icons": {
    "48": "icons/Book-48.png"
  },
  "permissions": [
    "activeTab",
    "tabs"
  ],
  "browser_action": {
    "default_icon": "icons/Book-32.png",
    "default_title": "Library Proxy",
    "default_popup": "popup/popup.html"
  }
}