Router & bridge mode, settings, DHCP reservation, web interface, reports, and MSP?

Doing my due diligence before buying in...

1. When switching between router and bridge modes, are the settings retained? In other words, if I have settings in router mode, then switch to bridge, then back to router, are the router settings restored? If not, I presume settings can be saved to a file?

2. Since DHCP reservation is not possible until the MAC is seen by Firewalla, can the bridge mode be used to "introduce" all the devices to Firewalla and as a way to configure the reservations before going to router mode?

3. Is the web interface served up by the appliance (i.e., local), or cloud?

4. Can the web interface be used to configure DHCP reservations?

5. What does MSP provide that the web interface does not? I read that the professional plan provides 30 days of flows, but doesn't the appliance already store that information?

6. What is "one 30-Day Flows seat"? Is the seat for a device or user?

7. Can a report be specified to capture all the URLs or hosts on a particular client?

I am using a Sonicwall and have previously used Sophos and OPNSense. I get that Firewalla is a different animal, but basic configurations seem much easier, as well as getting reports, etc. Is there anything else I need to know so I won't be surprised?

Many thanks.