Examine source code of Linkstache - Bookmark manager

{
  "manifest_version": 2,
  "name": "Linkstache",
  "version": "2.6.3",
  "description": "Side panel that allows you to manage your bookmarks using Linkstache.",
  "browser_specific_settings": {
    "gecko": {
      "id": "linkstache@linkstache.com",
      "strict_min_version": "109.0"
    },
    "safari": {
      "strict_min_version": "14",
      "strict_max_version": "20"
    }
  },
  "icons": {
    "16": "images/mustache-16.png",
    "32": "images/mustache-32.png",
    "48": "images/logo-48-circle-blue.png",
    "128": "images/logo-128-circle-blue.png"
  },
  "background": {
    "scripts": [
      "service-worker.js"
    ]
  },
  "browser_action": {
    "default_title": "Linkstache",
    "default_icon": "images/mustache-48.png"
  },
  "sidebar_action": {
    "default_icon": {
      "16": "images/mustache-16.png",
      "32": "images/mustache-32.png"
    },
    "default_title": "Linkstache",
    "default_panel": "sidepanel.html",
    "open_at_install": true
  },
  "permissions": [
    "menus",
    "tabs",
    "storage"
  ]
}