Please provide the domains and ports required to install extensions behind a firewall

Bug Reports
1

Describe the Bug

Hi,

Due to our corporate firewall, I’m currently unable to install extensions in Cursor.

Can you please provide the full list of domains and ports that must be whitelisted so extension downloads work properly?

Specifically, I need extensions like Pylance and Python, for features like “Go to Definition” and syntax highlighting.

Please list all required domains and ports clearly — no suggestions, just the official list that should be allowed through the firewall.

Thanks.

Steps to Reproduce

  1. Open Cursor.
  2. Go to the Extensions tab.
  3. Search for “Pylance” or “Python”.
  4. Click “Install”.
  5. The status shows “Installing…” but nothing happens.

Expected Behavior

Download extenstions that I want to use.

Operating System

Windows 10/11

Current Cursor Version (Menu → About Cursor → Copy)

Version: 0.50.7 (user setup) (VERSION OVER 1 IS SAME)
VSCode Version: 1.96.2
Commit: 02270c8441bdc4b2fdbc30e6f470a589ec78d600
Date: 2025-05-24T18:32:30.918Z
Electron: 34.3.4
Chromium: 132.0.6834.210
Node.js: 20.18.3
V8: 13.2.152.41-electron.0
OS: Windows_NT x64 10.0.19044

Does this stop you from using Cursor

Sometimes - I can sometimes use Cursor

3

Please see Security | Cursor - The AI Code Editor for the full list of URLs. We use port 443 (https).