Interesting note: #malwarebytesbrowserguard overwrites window.print with it's own custom code.
This code detects when print has been called "too many times".
I am unclear under what conditions this function is overwritten, as it is not on all websites and not consistent with what websites it is enabled.

Code: https://iam-py-test.github.io/security_research/mbg_print_overwrite.txt

#malwarebytesbrowserguard allegedly causes anti-blocker on YouTube even when it's adblocking component is disabled.
If you have anti-blocker on YouTube, completely disable Malwarebytes Browser Guard and test using only your content blocker.

#MalwarebytesBrowserGuard is using #EasyList without crediting the EasyList maintainers

https://web.archive.org/web/20231123121010/https://forums.malwarebytes.com/topic/304787-is-malwarebytes-browser-guard-using-easylist/

#malwarebytesbrowserguard users: The "Ads/Trackers" blocking feature is known to conflict with uBlock Origin.
I would recommend disabling that feature. The malware blocking shouldn't not cause any problems.
In general, do not use more than one ad/content blocker.

Also, if you are investigating an issue with YouTube, be sure to *completely* disable Malwarebytes Browser Guard as it may bizarrely cause problems even with the ad/tracker blocking disabled.