Yes. I am using Firefox on both my Windows 10 1809 machine and MacOS Mojave laptop. I have all ad-blockers disabled, firefox's privacy features disabled too and using the latest verison of Firefox.
Trying IE11 now, oddly IE11 won't even load the https://facer.io website.
Google Chrome results: not a problem and working like it should! The Themes/Pro banner stays seperate from the layers. see below: