Examine source code of YTime Tracker

{
  "manifest_version": 2,
  "name": "YTime Tracker — Active & Idle Time",
  "version": "1.2.0",
  "description": "Your Time Tracker. Tracks browsing time and activity locally. Unlimited history, weekly bars. Privacy focused.",
  "browser_specific_settings": {
    "gecko": {
      "id": "ytime-tracker@firefox",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "browsingActivity"
        ],
        "optional": [
          "technicalAndInteraction"
        ]
      }
    }
  },
  "permissions": [
    "tabs",
    "storage",
    "alarms",
    "activeTab",
    "idle",
    "notifications",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.youtube.com/*"
      ],
      "js": [
        "content_youtube.js"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "https://*.spotify.com/*",
        "https://music.yandex.ru/*",
        "https://music.yandex.com/*",
        "https://vk.com/*",
        "https://music.apple.com/*",
        "https://soundcloud.com/*"
      ],
      "js": [
        "content_music.js"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "https://*.twitch.tv/*"
      ],
      "js": [
        "content_twitch.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "web_accessible_resources": [
    "blocked.html"
  ]
}