Examine source code of buyPal

{
  "manifest_version": 2,
  "name": "buyPal",
  "version": "1.1.0",
  "description": "buyPal - Dein Shopping Assistant. Erfasst automatisch deine Einkäufe und hilft dir, deine Ausgaben im Blick zu behalten.",
  "browser_specific_settings": {
    "gecko": {
      "id": "buypal@mybuypal.com",
      "strict_min_version": "58.0"
    },
    "gecko_android": {
      "strict_min_version": "113.0"
    }
  },
  "permissions": [
    "activeTab",
    "tabs",
    "storage",
    "cookies",
    "<all_urls>",
    "webNavigation",
    "alarms"
  ],
  "background": {
    "scripts": [
      "buypalback.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_icon": {
      "36": "icons/android-icon-36x36.png",
      "48": "icons/android-icon-48x48.png",
      "72": "icons/android-icon-72x72.png",
      "96": "icons/android-icon-96x96.png",
      "144": "icons/android-icon-144x144.png",
      "192": "icons/android-icon-192x192.png"
    },
    "default_title": "buypal"
  },
  "icons": {
    "36": "icons/android-icon-36x36.png",
    "48": "icons/android-icon-48x48.png",
    "72": "icons/android-icon-72x72.png",
    "96": "icons/android-icon-96x96.png",
    "144": "icons/android-icon-144x144.png",
    "192": "icons/android-icon-192x192.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>",
        "*://*/*",
        "file:///*"
      ],
      "js": [
        "buypalfront.js"
      ],
      "all_frames": true,
      "match_about_blank": true
    }
  ],
  "web_accessible_resources": [
    "*"
  ],
  "content_security_policy": "script-src 'self'; object-src 'self';",
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  },
  "author": "Lumiflow UG",
  "homepage_url": "https://mybuypal.com",
  "developer": {
    "name": "Lumiflow UG",
    "url": "https://mybuypal.com"
  }
}