As far as I know they officially support IE and FireFox but not chrome as there are several little things here and there that do not work in it with the interface.
As Donald says, IpMonitor 10 does support FF. Browser Support another thread that confirms that:
Looks like you may need to open a support ticket for this.
When you open a support ticket, would you:
--Reference this thread to Support.
--Post back here with a case number.
--Post any solutions you get from Support.
All 8 staff members at my place get the same alert when using FFA 4 and/or 5. It's mostly cosmetic tho, as far as we can tell.