Testing of Dev releases is very important. The more testers the better for all users. There are recent examples of too few testers:
https://community.ipfire.org/t/cu-164-backup-issue/7614
including one issue that you were kind enough to participate in:
https://community.ipfire.org/t/dhcp-hosts-not-reliably-propagated-to-dns/3431/35
The above posts should convince you not to use your “main” (production) IPFire device for testing. And it should have convinced you to build up a “spare” (old) computer and assist in testing (on the spare).
IPFire 
testers! ← new bumper sticker