pfSense

The DNS Forwarder Interfaces selection UI is too small, and as a multiple selection dropdown is very awkward to use when you have more than a small handful of interfaces. It should be a list of checkboxes or a more advanced multiselect, e.g. https://mdbootstrap.com/docs/jquery/forms/multiselect/ (anything other than the "Default multiselect")

e.g. use case: attempting to enable one additional interface, a user may be inclined to click on it - forgetting to hold down the right modifier key blows away the existing selections.