Blocking the Google Drive "This browser version is no longer supported" warning

[LaurieWilliams5066]

Google's list of browsers in which Drive can work includes Firefox, but for many months every time I open Drive, a Google Doc or a Google Sheet in Firefox this warning appears at the top of the page:

"This browser version is no longer supported. Please upgrade to a supported browser."

Obviously not true, because the browser is supported by Mozilla which produces and maintains it.
When the X is used to close that warning the page becomes inactive until clicked or tapped.
Can Stylus be used to block all those popups?

[tophf]

If hiding this warning via CSS allows using the page then you can do it with Stylus, otherwise I don't think Stylus should add such a feature, because it sounds like a bug in GDrive that should be either fixed by Google or by a separate userscript.