Not just Firefox though, some oddities occur with whatever the new version of IE is called.
Chrome seems to be okay, but for best results, I have to use Opera(!)
Microsoft's new Edge browser is Chromium-based:
2018-12-06 - Microsoft announced its intent to base Edge on the Chromium source code, using the same rendering engine as Google Chrome but with enhancements developed by Microsoft.
2019-04-08 - The first Chromium-based builds of Edge for Windows were released to the public.
2020-01-15 - The new Edge was released.
https://www.zdnet.com/article/microsofts-edge-to-morph-into-a-chromium-based-cross-platform-browser/Microsoft Edge and Chromium Open Source:
https://github.com/MicrosoftEdge/MSEdge
