Firefox's mask setting method for a proxy not used for network disconnection

A network segment does not use the proxy to set ff and IE. ie uses the * wildcard, and FF uses the CIDR notation,

The simple setting method of FF is as follows (taking the 192 CIDR block as an example, you can change it to the number of your blocked IP addresses ):

If 192.0.0.0-192.255.255.255 is blocked, set 192.160.0/8.
If 192.168.0.0-192.168.255.255 is blocked, set 192.168.0.0/16.
If 192.168.1.0-192.168.1.255 is blocked, set 192.168.1.0/24.

IP
The address is represented by 32bit, And the number (range: 1-32) after/Represents the IP address segment of the mask. For example,/8 represents the IP address segment after the 8-bit IP address of the mask, that is
Xxx.0.0.0-xxx.255.255.255. Another example is shielding 10.128.0.0.
-10.20.255.255 (9 bits are followed by the mask IP segments), you can set it to 10.128.0.0/9, which cannot be expressed by wildcards.