Comment by Loeffelmann

This worked on firefox

   const event = new Event("mousedown")

   const pArr = Array.from(document.querySelectorAll("p"))

   function switchSymbol(target) {
     target.dispatchEvent(event);
   }

   function switchUntil(target, until) {
     while (target.innerText !== until) {
       switchSymbol(target);
     }
   }

   for (const p of pArr) {
     switchUntil(p, "")
   }

Change the second argument of switchUntil to the emoji you want. HN doesn't allow emojis