The Great Tab Suspender

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "The Great Tab Suspender",
  "description": "suspend unused/inactive tabs to save memory, and for sure you can recover them",
  "version": "1.2.1",
  "manifest_version": 2,
  "permissions": [
    "tabs",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "commands": {
    "toggle-suspend": {
      "suggested_key": {
        "default": "Ctrl+Shift+S",
        "windows": "Ctrl+Shift+S",
        "mac": "Command+Shift+K"
      },
      "description": "Toggle page suspend"
    }
  },
  "browser_action": {
    "default_popup": "popup.html"
  },
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  }
}