Examine source code of One-Click TickTick

{
  "manifest_version": 2,
  "name": "One-Click TickTick",
  "description": "Instantly create a new TickTick task with a link to the current page in just one click!",
  "version": "1.4.2",
  "background": {
    "scripts": [
      "/service-worker.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/icon16.png",
      "24": "icons/icon24.png",
      "32": "icons/icon32.png"
    },
    "default_title": "Create Task"
  },
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "64": "icons/icon64.png",
    "128": "icons/icon128.png",
    "256": "icons/icon256.png"
  },
  "options_page": "options.html",
  "permissions": [
    "notifications",
    "contextMenus",
    "activeTab",
    "storage",
    "sessions",
    "identity"
  ],
  "host_permissions": [
    "https://ticktick.com/oauth/token",
    "https://api.ticktick.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{78ee7f4b-e86c-4b7f-955d-3a4532ec3e1b}"
    }
  }
}