--- a/toolkit/content/aboutTelemetry.js
+++ b/toolkit/content/aboutTelemetry.js
@@ -335,16 +335,17 @@ var PingPicker = {
 
       // Change home page text.
       pingNameSpan.textContent = pingName;
       let explanation = bundle.GetStringFromName("pingDetailsCurrent");
       fragment = BrowserUtils.getLocalizedFragment(document, explanation, pingLink, pingNameSpan);
     }
 
     let pingExplanation = document.getElementById("ping-explanation");
+    removeAllChildNodes(pingExplanation);
     pingExplanation.appendChild(fragment);
     pingExplanation.querySelector(".change-ping").addEventListener("click", (ev) => {
       document.getElementById("ping-picker").classList.remove("hidden");
       ev.stopPropagation();
     });
 
     GenericSubsection.deleteAllSubSections();
   },