Prerequisites

• I verified that this is not a filter list issue. Report any issues with filter lists or broken website functionality in the uAssets issue tracker.
• This is not a support issue or a question. For support, questions, or help, visit /r/uBlockOrigin.
• I performed a cursory search of the issue tracker to avoid opening a duplicate issue.
• The issue is not present after disabling uBO in the browser.
• I checked the documentation to understand that the issue I am reporting is not normal behavior.

I tried to reproduce the issue when...

• uBO is the only extension.
• uBO uses default lists and settings.
• using a new, unmodified browser profile.

Description

They checks that google-adsense or googlesyndication exists in XMLHttpRequest.prototype.responseText via jQuery.ajax.done.

• https://piquark6046.github.io/testpage/XMLResponse-aagag/20230810/
• aagag.com AdguardTeam/AdguardFilters#158625
• aagag.com List-KR/List-KR#769

A specific URL where the issue occurs.

https://aagag.com/issue/?idx=1275471

Steps to Reproduce

Pleas visit the website.
If you use List-KR filters list or uAssets filters lists:

@@||pagead2.googlesyndication.com/pagead/js/adsbygoogle.js$xhr,from=aagag.com,badfilter

Expected behavior

Return AdGuard's googlesyndication-adsbygoogle-like redirection resource.

Actual behavior

The returned redirection resource is not much like the real thing.

uBO version

1.51.0

Browser name and version

Mozilla Firefox Developer Edition 117.0b5

Operating System and version

Ubuntu 23.04