#!/bin/bash

IFS=$'\t' read -r _ wid < <(xprop -root 32x '\t$0' _NET_ACTIVE_WINDOW)
IFS=$'()"' read -r _ _ _ name  < <(xprop -id "$wid" '$0\n' WM_CLASS)
[[ $name == zathura ]] && xdotool key --clearmodifiers "$1"