Examine source code of HDRezka Speed Controller

{
  "manifest_version": 3,
  "name": "__MSG_extName__",
  "description": "__MSG_extDescription__",
  "version": "0.8.0",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "128": "icon/128.png"
  },
  "default_locale": "en",
  "author": "MaxScorpy",
  "permissions": [
    "storage",
    "scripting",
    "activeTab"
  ],
  "host_permissions": [
    "*://*.hdrezka.ag/*",
    "*://hdrezka.ag/*",
    "*://*.rezka.ag/*",
    "*://rezka.ag/*",
    "*://*.hdrezka.me/*",
    "*://hdrezka.me/*",
    "*://*.hdrezka.co/*",
    "*://hdrezka.co/*",
    "*://*.hdrezka.website/*",
    "*://hdrezka.website/*",
    "*://*.hdrezka.cm/*",
    "*://hdrezka.cm/*",
    "*://*.hdrezka-home.tv/*",
    "*://hdrezka-home.tv/*",
    "*://*.rezkify.com/*",
    "*://rezkify.com/*",
    "*://*.rezkery.com/*",
    "*://rezkery.com/*",
    "*://*.kinopub.me/*",
    "*://kinopub.me/*",
    "*://*.standby-rezka.tv/*",
    "*://standby-rezka.tv/*"
  ],
  "optional_host_permissions": [
    "*://*/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "hdrezka-speeds@maxscorpy",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": [
          "personalCommunications",
          "technicalAndInteraction"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "action": {
    "default_popup": "popup.html",
    "default_title": "HDRezka Speed Controller",
    "default_icon": {
      "16": "icon/16.png",
      "32": "icon/32.png"
    }
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'; connect-src 'self' https://speeds-feedback.matsiyak.workers.dev https://hdrezka.ag https://*.hdrezka.ag https://rezka.ag https://*.rezka.ag https://hdrezka.me https://*.hdrezka.me https://hdrezka.co https://*.hdrezka.co https://hdrezka.website https://*.hdrezka.website https://hdrezka.cm https://*.hdrezka.cm https://hdrezka-home.tv https://*.hdrezka-home.tv https://rezkify.com https://*.rezkify.com https://rezkery.com https://*.rezkery.com https://kinopub.me https://*.kinopub.me https://standby-rezka.tv https://*.standby-rezka.tv"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.hdrezka-home.tv/*",
        "*://*.hdrezka.ag/*",
        "*://*.hdrezka.cm/*",
        "*://*.hdrezka.co/*",
        "*://*.hdrezka.me/*",
        "*://*.hdrezka.website/*",
        "*://*.kinopub.me/*",
        "*://*.rezka.ag/*",
        "*://*.rezkery.com/*",
        "*://*.rezkify.com/*",
        "*://*.standby-rezka.tv/*",
        "*://hdrezka-home.tv/*",
        "*://hdrezka.ag/*",
        "*://hdrezka.cm/*",
        "*://hdrezka.co/*",
        "*://hdrezka.me/*",
        "*://hdrezka.website/*",
        "*://kinopub.me/*",
        "*://rezka.ag/*",
        "*://rezkery.com/*",
        "*://rezkify.com/*",
        "*://standby-rezka.tv/*"
      ],
      "all_frames": false,
      "run_at": "document_idle",
      "js": [
        "content-scripts/content.js"
      ]
    }
  ]
}