Examine source code of Roku pixel helper

{
  "manifest_version": 2,
  "name": "Roku pixel helper",
  "description": "Roku Pixel Helper is a Chrome extension that helps advertisers verify and troubleshoot warnings or errors during pixel installation.",
  "version": "1.0.3",
  "browser_action": {
    "default_popup": "popup/popup.html",
    "default_icon": "icons/roku-icon-128-neg.png",
    "default_title": "Roku pixel helper"
  },
  "content_scripts": [
    {
      "js": [
        "scripts/injector.js"
      ],
      "matches": [
        "http://*/*",
        "https://*/*"
      ]
    }
  ],
  "web_accessible_resources": [
    "scripts/content.js"
  ],
  "background": {
    "scripts": [
      "scripts/background.js"
    ],
    "persistent": false
  },
  "permissions": [
    "storage",
    "tabs",
    "http://*/*",
    "https://*/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{dadffd70-f76f-4471-8ac7-8d39f8ac03af}"
    }
  }
}