When clicking a link, a window appears saying:
“Link confirmation
You are about to open your default browser and visit: URL”

There is a checkbox “don’t show again”. Please add another option like “don’t show again for this second-level domain”.

There are many trusted websites where I don’t want to see this confirmation every time, and at the same time there are many unknown or suspicious sites where I do want to keep seeing the warning. Having per-domain control would make this much more convenient and useful.