Examine source code of Tab Suspender

{
  "name": "Tab Suspender",
  "description": "Manually discard all open tabs except the current one. Speed up your browser.",
  "version": "0.0.4",
  "manifest_version": 2,
  "background": {
    "scripts": [
      "js/background.js"
    ]
  },
  "browser_action": {
    "default_icon": "static/icon128.png",
    "default_title": "Suspend Tabs",
    "default_popup": "popup.html",
    "browser_style": true
  },
  "icons": {
    "48": "static/icon.svg",
    "96": "static/icon.svg"
  },
  "permissions": [
    "tabs"
  ],
  "homepage_url": "https://tabsuspender.info/"
}