Examine source code of Auto text expand & complete with hints

{
  "manifest_version": 2,
  "name": "Auto text expand & complete with hints",
  "short_name": "Auto text w/ hints",
  "version": "2.2.11",
  "author": "David D",
  "description": "Making web sites work better for us",
  "icons": {
    "16": "upDown16.jpeg",
    "48": "upDown48.jpeg",
    "128": "upDown128.jpeg"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "19": "upDown19.jpeg",
      "38": "upDown38.jpeg"
    },
    "default_title": "Click to open preference setting page for Auto expand & comiplete"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": false
  },
  "content_scripts": [
    {
      "matches": [
        "https://outlook.live.com/*",
        "https://mail.google.com/*",
        "https://outlook.office.com/*",
        "https://mail.yahoo.com/*",
        "https://*.service-now.com/*",
        "https://*.slack.com/*",
        "https://www.youtube.com/*",
        "https://chat.openai.com/*",
        "https://teams.microsoft.com/*"
      ],
      "js": [
        "jquery-3.7.0.min.js",
        "content.js",
        "jquery-ui.min.js"
      ]
    }
  ],
  "content_security_policy": "script-src 'self' https://ajax.googleapis.com  'unsafe-eval'; object-src 'self'",
  "permissions": [
    "storage",
    "downloads",
    "tabs",
    "unlimitedStorage",
    "contextMenus",
    "activeTab",
    "clipboardRead"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{155c680a-058c-4e78-a1c0-5c2f996bc525}"
    }
  }
}