Examine source code of auto suggestion

{
  "manifest_version": 2,
  "name": "Smart Suggestion Assistant",
  "version": "1.6.0",
  "description": "Auto Suggestion CIS",
  "author": "Mayur Kadbhane",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "activeTab",
    "storage",
    "tabs",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "styles.css"
      ],
      "run_at": "document_idle",
      "all_frames": true,
      "match_about_blank": true
    }
  ],
  "browser_action": {
    "default_popup": "popup/popup.html",
    "default_title": "Smart Suggestion Assistant"
  },
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "efilingecourts@gmail.com",
      "strict_min_version": "79.0"
    }
  },
  "web_accessible_resources": [
    "icons/*",
    "styles.css"
  ]
}