Examine source code of Tab Optimizer

{
  "manifest_version": 2,
  "name": "Tab Optimizer",
  "version": "1.0",
  "description": "Automatically suspend inactive tabs to increase browser speed and reduce memory load.",
  "permissions": [
    "tabs",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icons/icon.png"
  },
  "icons": {
    "48": "icons/icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c99b7aaa-845b-444a-b4b1-b9c40aed8744}"
    }
  }
}