Unfortunately, it is not known where it sits, but any attempts to neutralize it have failed. For what it's worth, it's interesting to note that the browser works after replacing it with TraceSetInformation. STATUS_BREAKPOINT without this feature starts at version 133.0.6876.1 from e3kskoy7wqk. I did a thorough search of the entire repository downloaded locally (including all 3rd party components) in 133.0.6876.1 and 6861.0, the use of this function in the code files has not changed at all. My suspicions fall on the dxc generated by mcgen during compilation, but I have no idea what to do about it next.
I am currently working on moving patches to version 120.0.6099.338 - one of the longer supported LTS versions. And one thing puzzles me - how the author moved the original commits from 2023 removing support for Win 7 (only that reversed, for that I already have a script) for all of his versions. All the diffs/commits after merging into one file are more than 35 thousand lines of code, and there are about 100 of them. And for most of the files, lines have changed in the meantime, where some code needs to be removed or added, in the case of some, for example, 50 lines. Did he correct it manually? I find it hard to believe... more than 650 files are being changed. I tried manually correcting the hunk, but quickly gave up. I even tried to create scripts that search for given passages in the original files and, based on that, determine new lines to put in the hunki, but that too succeeded for a small number of files.