Examine source code of HTTPS Enforcer

{
  "author": "Bhaskar Tallamraju",
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_title": "HTTPS Enforcer",
    "default_popup": "popup.html"
  },
  "description": "Secure browsing",
  "manifest_version": 2,
  "name": "HTTPS Enforcer",
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "tabs",
    "http://*/",
    "https://*/",
    "notifications"
  ],
  "version": "1.0",
  "web_accessible_resources": [],
  "icons": {
    "48": "icons/secured_48.png"
  }
}