I’ve got an even better idea.
From the WebUI, add a text box where the user enters the number of seconds to temporarily disable the ad blocker, and then in another text box generate a URL where it uses that value and the password hash so one can just copy that URL to make a bookmark. Since you need the password to get into the UI, this won’t violate any security concerns.
Sure, you can do this manually, but it would provide some very handy utility to a lot of users who just install PiHole and don’t poke around the weeds.