Examine source code of SaveYourTime

{
  "manifest_version": 3,
  "name": "SaveYourTime",
  "version": "14.0",
  "description": "Limit time soon, SaveYourTime!!!",
  "icons": {
    "16": "public/icons/icon16.png",
    "32": "public/icons/icon32.png",
    "64": "public/icons/icon64.png",
    "128": "public/icons/icon128.png"
  },
  "permissions": [
    "tabs",
    "storage",
    "alarms"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_popup": "html/popup.html"
  },
  "options_ui": {
    "page": "html/settings.html",
    "open_in_tab": true
  },
  "web_accessible_resources": [
    {
      "resources": [
        "html/*.html",
        "languages/*.json",
        "js/*.js",
        "public/icons/*.png",
        "public/css/*.css",
        "public/webfonts/*"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "content_security_policy": {
    "extension_pages": "default-src 'self'; style-src 'self' 'unsafe-inline'; font-src 'self'"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "js/libs/toastify.js",
        "script.js"
      ],
      "css": [
        "js/libs/toastify.min.css"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "mail@kubidev.com",
      "strict_min_version": "109.0",
      "icon": "public/icons/icon64.png"
    }
  }
}