Examine source code of CastPass

{
  "manifest_version": 2,
  "name": "CastPass",
  "version": "2.0.32.0",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "permissions": [
    "http://*/*",
    "https://*/*",
    "storage",
    "tabs",
    "alarms"
  ],
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "content-script.js"
      ],
      "all_frames": true
    }
  ],
  "background": {
    "scripts": [
      "webdht.js",
      "background.js"
    ],
    "persistent": true
  },
  "web_accessible_resources": [
    "index.html",
    "popover-remember.html",
    "popover-autofill.html"
  ],
  "browser_action": {
    "default_title": "BlockPass",
    "default_popup": "popup.html"
  },
  "content_security_policy": "script-src 'self'; object-src 'self'; img-src chrome://favicon https://api.faviconkit.com",
  "description": "castpass extension"
}