What are known browser_validations quirks?

[kevinh-csalabs]

The option config.browser_validations is set to false by default and 'recommended due to some quirks from different browsers.'

Is there any documentation on what browsers or what quirks to be on the lookout for that were identified as a reason to choose keeping this option as a default? I'm not looking for an exhaustive list, but any direction on the issues to look out for would be appreciated as I couldn't turn up anything in a google search or past issues.

It looks like this was originally true but changes back just shy of a decade ago related to error styling: ffac64e
and documentation was updated in 2014: cbeeb3b#diff-523378c56f55355a780b4524e2ee91f1b93de9a7fc9ae8395739e805eb187089R202