Examine source code of Taskler

{
  "manifest_version": 2,
  "name": "Taskler",
  "version": "2.2.3",
  "homepage_url": "https://taskler.kasper.space",
  "description": "A simple text editor on your New Tab page",
  "icons": {
    "16": "icon16.e0698023.png",
    "48": "icon48.265687ae.png",
    "128": "icon128.95b7afa1.png"
  },
  "chrome_url_overrides": {
    "newtab": "taskler.54a48f65.html"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{c2c694b1-248b-41ec-a6ac-940bee65cb10}"
    }
  }
}