Examine source code of Compat Report

{
  "description": "Shows a report of browser compatibility issues",
  "manifest_version": 2,
  "name": "Compat Report",
  "version": "0.1.1resigned1",
  "author": "Eduardo Bouças",
  "homepage_url": "https://github.com/eduardoboucas/compat-report",
  "icons": {
    "512": "logo_512.png"
  },
  "background": {
    "scripts": [
      "browser-polyfill.js",
      "background.js"
    ]
  },
  "permissions": [
    "<all_urls>",
    "tabs",
    "webNavigation"
  ],
  "devtools_page": "index.html",
  "browser_specific_settings": {
    "gecko": {
      "id": "{13d75c08-fed6-4ff6-a356-d79509b17e44}"
    }
  }
}