Examine source code of Comrade - Cash Back For Your Attention

{
  "description": "Earn instant cash back rewards for your attention when shopping online.",
  "version": "0.0.48",
  "manifest_version": 2,
  "name": "Comrade - Cash Back For Your Attention",
  "short_name": "Comrade",
  "permissions": [
    "*://*.adcomrade.com/*",
    "*://*.cmrd.com/*",
    "identity",
    "notifications",
    "storage",
    "tabs",
    "alarms"
  ],
  "background": {
    "page": "background.html",
    "persistent": true
  },
  "web_accessible_resources": [
    "content.bundle.js.map",
    "content-domain.bundle.js.map",
    "background.bundle.js.map",
    "app.bundle.js.map"
  ],
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "content.bundle.js"
      ],
      "run_at": "document_start",
      "all_frames": false
    },
    {
      "matches": [
        "*://*.adcomrade.com/*",
        "*://*.cmrd.com/*",
        "*://localhost/*"
      ],
      "js": [
        "content-domain.bundle.js"
      ],
      "run_at": "document_start"
    }
  ],
  "browser_action": {
    "default_title": "Comrade - Cash Back For Your Attention",
    "default_icon": "assets/icons/icon-offline-38.png",
    "default_popup": "app.html"
  },
  "icons": {
    "128": "assets/icons/icon-online-300.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{086e26e7-b912-47da-89cc-0a93bc0f5fde}"
    }
  }
}