Description

Hello,

being able to use different types of proxy rules is great. Domain, regex, wildcard, etc.
This makes life easy when creating rules for domain names and URLs.
But, I often want to connect to IP addresses that don't have a DNS record attached to them.
Even worse, I want to create rules for whole networks and subnets.

Creating individual Host Regex rules for those is tedious, as i have to convert them all to regex.
For example:
Creating a rule for subnet 192.168.1.0/25 results in regex ^(192\.168\.1\.(?:[0-9]|[1-9][0-9]|1(?:[0-1][0-9]|2[0-7])))$
A subnet 192.168.0.0/20 gets even worse (^(192\.168\.(?:[0-9]|1[0-5])\.(?:[0-9]|[1-9][0-9]|1(?:[0-9][0-9])|2(?:[0-4][0-9]|5[0-5])))$)

Would you consider it feasible to implement a "CIDR network" type rule?
In official Mozilla proxy auto configuration there is already a function that could serve as inspiration.
(isInNet(host, pattern, mask))

Thanks

Is your feature request related to a problem? Please describe.

No response

Describe alternatives you've considered

No response

Any additional context

Using wildcard matching alone is not feasible in this case.
Only certain network sizes (/8, /16, /24) can use wildcards (192.*, 192.168.*, 192.168.1.*)