Examine source code of HTTP to HTTPS

{
  "description": "Force Http to Https",
  "manifest_version": 2,
  "name": "HTTP TO HTTPS",
  "version": "4.0",
  "permissions": [
    "storage",
    "*://*/*",
    "webNavigation"
  ],
  "icons": {
    "48": "icons/border-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "background.js",
        "button.js"
      ]
    }
  ]
}