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URL: https://chatgpt.com

Browser / Version: Firefox 138.0
Operating System: Windows 11
Tested Another Browser: Yes Chrome

Problem type: Something else
Description: ChatGPT on clean Firefox install - "This page is slowing down Firefox."
Steps to Reproduce:
On fresh installed stable version of Firefox with no extensions or add-ons, or even in "Troubleshoot Mode".
Whenever I use ChatGPT (specifically a chat with a long conversation history), the browser freezes for 10-30 seconds and displays the error:
"This page is slowing down Firefox. To speed up your browser, stop this page."

If I don’t intervene, the page becomes unresponsive, and I have to manually close the warning. This cycle repeats 3-5 times per request.

View the screenshot Screenshot
Browser Configuration
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Closed: Works For Me
#154382

chatgpt.com - ChatGPT on clean Firefox install - "This page is slowing down Firefox."

Opened: 2025-04-30
Reporter: olegolegoleg
Comments: 7
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