Tab-Browser shows Certificate Error

Support Bug Reports
1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

When I started my FrontEnd project, which use a local proxy tool depending on our Self-Signed Certificates, the browser shows an error named “Certificate Error”.

I tried to fix it by allowing import the system certificates, but can not find where can I modify it…

Steps to Reproduce

  1. start a proxy tool which provide a self signed certificates.
  2. start frontend project and visit the site

Screenshots / Screen Recordings

微信图片_20251204191651_80_370.png
微信图片_20251204191651_80_370.png2464×1388 165 KB

Operating System

MacOS

Current Cursor Version (Menu → About Cursor → Copy)

Version: 2.1.47 (Universal)
VSCode Version: 1.105.1
Commit: 2d3ce3499c15efd55b6b8538ea255eb7ba4266b0
Date: 2025-12-04T02:31:50.567Z (8 小时前)
Electron: 37.7.0
Chromium: 138.0.7204.251
Node.js: 22.20.0
V8: 13.8.258.32-electron.0
OS: Darwin arm64 23.6.0

Does this stop you from using Cursor

Sometimes - I can sometimes use Cursor

2

Hey, thanks for the report. The built-in browser supports manually trusting certificates.

What to try:

  • On the error screen, click Trust Certificate and enable the Remember for this workspace checkbox.
  • Make sure your proxy’s root CA is installed in macOS Keychain Access: System keychain → Certificates → import the CA → Trust: Always Trust, then restart Cursor.
  • From the screenshot the certificate dates are 1970/1/21–1970/1/22. Please check your proxy’s certificate generation and your system time.

If that doesn’t help, please share:

  • Whether the same URL works in Chrome/Safari
  • Logs from Cursor: Help → Toggle Developer Tools → Console while opening the page
  • The exact proxy chain/tool you’re using

Related thread about adding the trust option: Cursor 2.0:Cannot open a page without a CA certificate in browser Tab

1 Like
3

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