Examine source code of OLBPlus Cashbackradar

{
  "manifest_version": 2,
  "name": "OLBPlus Cashbackradar",
  "description": "Verpassen Sie nie wieder Cashback mit dem OLBPlus Cashbackradar",
  "version": "1.0.1",
  "browser_action": {
    "default_icon": "icon16.png",
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "js/eventPage.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "js/pageScript.js"
      ],
      "all_frames": true,
      "run_at": "document_end"
    }
  ],
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "64": "icon64.png",
    "128": "icon128.png"
  },
  "permissions": [
    "webRequest",
    "storage",
    "webRequestBlocking",
    "*://meta.tamola.de/*"
  ],
  "web_accessible_resources": [
    "icon48.png"
  ]
}