Chrome Tab Unloader

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Chrome Tab Unloader",
  "short_name": "Tab Unloader",
  "description": "This extension gives you a button to save your system resources by replacing open tabs with placeholders.",
  "version": "1.0.2",
  "browser_action": {
    "default_icon": {
      "19": "images/icon19.png",
      "38": "images/icon38.png"
    },
    "default_popup": "popup.html"
  },
  "homepage_url": "https://github.com/idupree/chrome-tab-unloader",
  "icons": {
    "16": "images/icon16.png",
    "19": "images/icon19.png",
    "32": "images/icon32.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "permissions": [
    "tabs",
    "chrome://favicon/"
  ]
}