Save Webpages Offline As MHTML

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Save Webpages Offline As MHTML",
  "short_name": "SavePage",
  "description": "Save offline copy of current tab as MHTML file. Keyboard Command Alt+S.",
  "version": "1.0.1",
  "icons": {
    "16": "static/icon-16.png",
    "48": "static/icon-48.png",
    "128": "static/icon-128.png"
  },
  "permissions": [
    "activeTab",
    "pageCapture",
    "contextMenus"
  ],
  "background": {
    "scripts": [
      "js/FileSaver.min.js",
      "js/background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_icon": "static/icon-128.png",
    "default_title": "Save Page Offline. Keyboard Shortcut Alt+S."
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Alt+S"
      }
    }
  },
  "manifest_version": 2,
  "homepage_url": "https://browsernative.com/save-webpage-offline-mhtml/"
}