Examine source code of PhotoScout

{
  "manifest_version": 3,
  "name": "PhotoScout",
  "version": "1.0.2.1",
  "description": "PhotoScout",
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "action": {
    "default_icon": "icon.png"
  },
  "permissions": [
    "activeTab",
    "tabs"
  ],
  "web_accessible_resources": [
    {
      "resources": [],
      "matches": [
        "*://*.photoscout.io/*"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "all_frames": true
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "ps@photoscout.io"
    }
  }
}