Examine source code of OpenLinks

{
  "manifest_version": 2,
  "name": "OpenLinks",
  "version": "1.0.6",
  "description": "Opens a lot of links at once.",
  "homepage_url": "https://github.com/jimmyaffatigato/OpenLinks",
  "author": "Jimmy Affatigato",
  "icons": {
    "48": "icons/links-icon-48.png"
  },
  "permissions": [
    "activeTab",
    "storage",
    "<all_urls>"
  ],
  "background": {
    "page": "background.html"
  },
  "browser_action": {
    "default_icon": "icons/links-icon-32.png",
    "default_title": "OpenLinks",
    "default_popup": "openLinks.html"
  }
}