Background disappears in the built-in browser tab

Support Bug Reports
1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

Background disappears in the built-in browser tab
Environment: macOS (darwin 25.1.0)

Steps to Reproduce

Reproduction: Open the page in Cursor’s browser tab; the background grid animation does not render. Works fine in Chrome.

Screenshots / Screen Recordings

browser tab.png
browser tab.png1505×470 35.1 KB

Operating System

MacOS

Current Cursor Version (Menu → About Cursor → Copy)

Version: 2.3.29 (Universal)
VSCode Version: 1.105.1
Commit: 4ca9b38c6c97d4243bf0c61e51426667cb964bd0
Date: 2026-01-08T00:34:49.798Z
Electron: 37.7.0
Chromium: 138.0.7204.251
Node.js: 22.20.0
V8: 13.8.258.32-electron.0
OS: Darwin arm64 25.1.0

Additional Information

Related code: The html::before pseudo-element animation in app/globals.css
Note: If the built-in browser is based on Electron/Chromium, this may be a compatibility issue with CSS pseudo-elements or animations.

Does this stop you from using Cursor

Sometimes - I can sometimes use Cursor

3

Hey @Morris_Yang!

Thanks for reporting. I’m having a little trouble parsing what this means

Could you give a few more details, or show how it looks in Chrome vs. Cursor? Would love to be able to reproduce this myself!

4

chrome
chrome1920×1091 145 KB

browser tab
browser tab1505×470 35.1 KB

first screenshot is chrome view, and the second screenshot is from browser tab view

Second one is all black (without background+animation), and after scrolling it have a white background at the bottom of the screenshot

5

also this is happened right after the update today.

6

Thanks @Morris_Yang!

I can reproduce this on https://particles.js.org/, but it looks like it’s already fixed on Nightly, so I expect a fix will land in 2.4.

Thanks for the report.

1 Like