I recently came from Smoothwall. While the web interface is way better in IPFire, I do miss a couple small things Smoothwall had. When editing rules, it would be nice to have checkboxes where you can select multiple rules to delete at once. Sometimes I need to remove several rules at a time, and being able to select multiple to delete would be nice. Editing the rule file itself is always an option, but the rules get mixed up in the file, and are not always in the same order as they are in the web interface.
Also, having a popup to confirm deleting of rules would be good to prevent accidentally deleting rules by mistake. If you accidently delete a rule, it doesn’t take effect until you apply the changes, but there isn’t an undo option.