Examine source code of Snooze tabs

{
  "manifest_version": 2,
  "name": "Tab Snooze",
  "version": "0.2.0",
  "author": "Ramkumar K R",
  "description": "Snooze tabs to open at a specific time",
  "permissions": [
    "tabs",
    "notifications",
    "alarms",
    "storage",
    "cookies"
  ],
  "browser_action": {
    "theme_icons": [
      {
        "light": "resources/icon-dark.png",
        "dark": "resources/icon.png",
        "size": 48
      }
    ],
    "default_title": "Snooze",
    "default_popup": "popup/index.html",
    "browser_style": true
  },
  "applications": {
    "gecko": {
      "id": "{10d756ed-15e2-49f2-bad0-59bb8c19296a}",
      "strict_min_version": "57.0"
    }
  },
  "sidebar_action": {
    "default_icon": "resources/icon.png",
    "default_title": "Snoozed Tabs",
    "default_panel": "listing/index.html?sidebar=true"
  },
  "background": {
    "scripts": [
      "js/background.js"
    ]
  },
  "icons": {
    "48": "resources/icon.png"
  },
  "options_ui": {
    "page": "options/index.html",
    "open_in_tab": true
  }
}