Examine source code of Sessionaire

{
  "manifest_version": 2,
  "name": "Sessionaire",
  "version": "1.4.6",
  "description": "Master your browser sessions - Save, restore, and manage tabs with ease",
  "author": "Sessionaire Team",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "tabs",
    "storage",
    "sessions",
    "unlimitedStorage",
    "contextualIdentities",
    "cookies"
  ],
  "background": {
    "scripts": [
      "storage/storage.js",
      "utils/session-manager.js",
      "utils/crash-recovery.js",
      "core/js/background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png"
    },
    "default_title": "Sessionaire - Manage your tabs and sessions",
    "default_popup": "sessionaire-mini.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "sessionaire@sessionaire.app",
      "strict_min_version": "58.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "chrome_url_overrides": {
    "newtab": "sessionaire-newtab.html"
  },
  "commands": {
    "open-sessionaire": {
      "suggested_key": {
        "default": "Alt+Shift+Down",
        "mac": "MacCtrl+Shift+Down"
      },
      "description": "Open Sessionaire"
    },
    "quick-save-session": {
      "suggested_key": {
        "default": "Alt+Shift+Up",
        "mac": "MacCtrl+Shift+Up"
      },
      "description": "Quick save session with name prompt"
    }
  }
}