Examine source code of PageSpeedOff

{
  "manifest_version": 2,
  "name": "PageSpeedOff",
  "version": "2.1.0",
  "author": "Dr. Cheap",
  "description": "Disables Google PageSpeed",
  "homepage_url": "https://github.com/drcheap/PageSpeedOff",
  "permissions": [
    "storage",
    "tabs",
    "webRequest",
    "webRequestBlocking",
    "http://*/*",
    "https://*/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "pagespeedoff@drcheap.com"
    }
  },
  "icons": {
    "16": "icons/logo-16-slash.png",
    "32": "icons/logo-32-slash.png",
    "48": "icons/logo-48-slash.png",
    "64": "icons/logo-64-slash.png",
    "96": "icons/logo-96-slash.png",
    "128": "icons/logo-128-slash.png"
  },
  "options_ui": {
    "page": "options.html",
    "browser_style": false
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Initializing...",
    "default_icon": {
      "16": "icons/logo-16.png",
      "32": "icons/logo-32.png"
    }
  }
}