Examine source code of Efficiency Split Screen

{
  "name": "Efficiency Split Screen",
  "description": "Split screen to improve search efficiency. Click search link in one window and open it in another.",
  "version": "2.0.10",
  "manifest_version": 2,
  "background": {
    "scripts": [
      "utility.js",
      "background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/black16.png",
      "24": "icons/black24.png",
      "32": "icons/black32.png",
      "48": "icons/black48.png",
      "64": "icons/black64.png"
    },
    "default_title": "Efficiency Split Screen"
  },
  "icons": {
    "16": "icons/black16.png",
    "24": "icons/black24.png",
    "32": "icons/black32.png",
    "48": "icons/black48.png",
    "64": "icons/black64.png"
  },
  "author": "autosubtitle.service@gmail.com",
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+A",
        "mac": "Command+Shift+A"
      }
    }
  },
  "minimum_chrome_version": "105",
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "all_frames": true,
      "run_at": "document_start"
    }
  ],
  "options_ui": {
    "page": "options_ui.html",
    "open_in_tab": true,
    "browser_style": true
  },
  "permissions": [
    "menus",
    "scripting",
    "storage",
    "tabs",
    "<all_urls>"
  ],
  "applications": {
    "gecko": {
      "strict_min_version": "105.0",
      "id": "{6ef6696a-53d9-4186-aefc-0587ba54ebcb}"
    }
  }
}