Examine source code of Telemark

{
  "name": "Telemark",
  "version": "1.6",
  "description": "Bookmark your tabs in Telegram!",
  "browser_action": {
    "default_popup": "popup/index.html",
    "default_icon": {
      "16": "images/telemark_16.png",
      "32": "images/telemark_32.png",
      "48": "images/telemark_48.png",
      "128": "images/telemark_128.png"
    }
  },
  "commands": {
    "send-to-telegram": {
      "suggested_key": {
        "default": "Ctrl+Shift+K",
        "mac": "Command+Shift+K"
      },
      "description": "Send to Telegram."
    }
  },
  "icons": {
    "16": "images/telemark_16.png",
    "32": "images/telemark_32.png",
    "48": "images/telemark_48.png",
    "128": "images/telemark_128.png"
  },
  "background": {
    "scripts": [
      "script/jquery.js",
      "script/functions.js",
      "script/background.js"
    ]
  },
  "permissions": [
    "storage",
    "tabs",
    "contextMenus",
    "clipboardRead",
    "https://api.tgmark.ir/*"
  ],
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "{71954ed2-d7ae-45b6-9a29-a72151a3d125}"
    }
  }
}