Examine source code of CaptchaSonic: Solve BLS Captcha

{
  "manifest_version": 2,
  "name": "CaptchaSonic BLS",
  "description": "CaptchaSonic BLS - Solve BLS visa appointment captchas automatically",
  "version": "0.1.5",
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "default_locale": "en",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "popup.html",
    "open_in_tab": true
  },
  "minimum_chrome_version": "100.0",
  "content_security_policy": "script-src 'self'; object-src 'self';",
  "browser_specific_settings": {
    "gecko": {
      "id": "addonbls@captchasonic.com",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "tabs",
    "storage",
    "activeTab",
    "scripting",
    "clipboardRead",
    "*://*.blsspainvisa.com/*",
    "*://*.blsitalyvisaservices.com/*",
    "*://*.blsinternational.com/*",
    "*://*.blshungaryvisaservices.com/*",
    "*://*.blsportugalvisaservices.com/*",
    "*://*.blsspainglobal.com/*"
  ],
  "web_accessible_resources": [
    "*",
    "content-scripts/notify.css"
  ],
  "browser_action": {
    "default_title": "CaptchaSonic Extension",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.blshungaryvisaservices.com/*",
        "*://*.blsinternational.com/*",
        "*://*.blsitalyvisaservices.com/*",
        "*://*.blsportugalvisaservices.com/*",
        "*://*.blsspainglobal.com/*",
        "*://*.blsspainvisa.com/*"
      ],
      "all_frames": true,
      "js": [
        "content-scripts/bls.js"
      ]
    },
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content-scripts/notify.js"
      ]
    }
  ]
}