somehow the horizontal scrolling bar is missing in the firefox browser.
Even in your examples. (e.g. https://bryntum.com/examples/grid/multiregion/)
Any idea how to quick fix this?
Thanks for your clarification. We've reproduced it in ubuntu + firefox. I've created a ticket for that. Here it is : https://github.com/bryntum/support/issues/4989
Best of luck,