The problem with HTTPS websites is it can cause you to get infected with root kits, malware, or ransomware such as Cryptowall and Locky.
This video shows you how to configure a WatchGuard firewall for remote management. This is effective when you need support from WatchGuard.
WatchGuard firewalls come with a policy that allows all traffic to be allowed outbound, this video goes over the pro's and con's.
This video shows you how to configure WatchGuard's Reputation Enabled Defense, also knows as RED.
Setting up WatchGuard Branch Office VPN policies and what you can do with them. Just creating a VPN is not always the best way to maintain security, especially when dealing with outside vendors or third parties.