[BUG]: Blocks Google AI Overviews with a "400 Malformed Request" Error

[plantindesk]

Description

When the extension is active, attempting to use Google AI mode results in a 400 error. That's an error. Your client's request is malformed or illegal. This causes the AI feature to fail to load.

Disabling the extension immediately resolves the issue, and the Google AI mode function works correctly.

Reproducible Steps

1. Ensure the ClearURLs extension is installed and active.
2. Navigate to Google Search (e.g., google.com).
3. Toggle AI mode button.
4. Perform search query
5. The page may behave like this

Error Logs:

• The following error message was observed in the browser's developer tools (specifically in the context of the extension's background page) immediately after the failure:

[Error: No tab with id: 1218071573.
Context
_generated_background_page.html
Stack Trace
core_js/tools.js:277 (handleError)

Environment

OS: Windows 11
Browser: Helium browser (ungoogled chromium fork)
Extension Version: 1.27.3 - (2025-02-05)

[huoyan1231]

same issue here
tested on firefox and chrome

[Yeah-Jack]

Also happens on Brave. Sometimes in the Google All search result page, the small AI Overview window works, but other times it does not.

Very rough and probably wrong guess
Maybe Google caches the AI response of highly popular search query so they can be instantly shipped with the search result. Unpopular search requests have to get first processed by Google's AI and can only then be sent back to the user. This would potentially also explain why for very specific queries, the results of AI overview takes a few seconds longer to load instead of being there instantly. So ClearURLs maybe blocks the request sent to Google's AI server?