Examine source code of Keep Your Time

{
  "manifest_version": 2,
  "name": "__MSG_extName__",
  "description": "__MSG_extDescription__",
  "version": "3.0.3",
  "icons": {
    "16": "icon-16.png",
    "32": "icon-32.png",
    "48": "icon-48.png",
    "128": "icon-128.png"
  },
  "default_locale": "en",
  "permissions": [
    "storage",
    "tabs",
    "idle",
    "alarms",
    "notifications",
    "scripting",
    "<all_urls>"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "keep-your-time@stt.local",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "browsingActivity"
        ],
        "optional": [
          "personallyIdentifyingInfo",
          "authenticationInfo"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Час на сайтах",
    "default_popup": "popup.html"
  },
  "options_ui": {
    "open_in_tab": true,
    "page": "options.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://keepyourtime.org/auth/extension*"
      ],
      "run_at": "document_end",
      "js": [
        "content-scripts/auth-bridge.js"
      ]
    }
  ]
}