Examine source code of Panda Snap

{
  "version": "0.1.1",
  "name": "Panda Snap",
  "homepage_url": "https://pandasnap.io",
  "description": "Snap and store inspiring designs around the web for inspiration on your next project.",
  "author": "@kanga_bru",
  "manifest_version": 2,
  "permissions": [
    "activeTab",
    "clipboardWrite",
    "contextMenus",
    "cookies",
    "downloads",
    "identity",
    "notifications",
    "storage",
    "webRequest",
    "webRequestBlocking",
    "*://*.pandasnap.io/",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_icon": "icons/logo_48.png",
    "default_title": "Take snap of page"
  },
  "icons": {
    "16": "icons/logo_16.png",
    "48": "icons/logo_48.png",
    "128": "icons/logo_128.png"
  },
  "web_accessible_resources": [
    "*.css"
  ],
  "commands": {
    "screenshot": {
      "suggested_key": {
        "default": "Ctrl+Shift+S",
        "mac": "Ctrl+Shift+S"
      },
      "description": "Snapshot"
    }
  },
  "options_ui": {
    "page": "settings.html",
    "browser_style": false
  }
}