[ovirt-users] I can't download console.rdp on VM Portal with Firefox

I am testing the lastest version of ovirt-engine 4.4.7.7-1 before updating. when I log into the VM portal and want to download the Remote Destop file (console.rdp) from a Windows VM, the file I receive is console.vv instead of console.rdp. So I have to rename the file to console.rdp. This problem is only with firefox. Edge and google chrome don't have this problem. Do you know why ?