What ports are best to use for web hosting?

Is there a range of ports I should be using for hosting websites?

I am hosting a number of web servers at home, (10+) and I have been assigning each a different port.

I started with the default at port 80, then just continued at 81, 82...

When I got to 87, Firefox blocked the port.

While I can unblock that port in my Firefox, I don't want to teach the rest of the world to do that.

It got me thinking on this subject.

Can anyone shed some light on this subject?

The OCD part of me wants the port(s) range to be consecutive, but if needed, I can probably overcome that.

Thanks, Mark.