diff --git a/browser/components/tabbrowser/content/tab-hover-preview.mjs b/browser/components/tabbrowser/content/tab-hover-preview.mjs
index 69d01a30afda..046da5dba287 100644
--- a/browser/components/tabbrowser/content/tab-hover-preview.mjs
+++ b/browser/components/tabbrowser/content/tab-hover-preview.mjs
@@ -50,6 +50,9 @@ export default class TabHoverPreviewPanel {
   getPrettyURI(uri) {
     try {
       const url = new URL(uri);
+      if (url.protocol === "about:") {
+        return url.href;
+      }
       return `${url.hostname}`.replace(/^w{3}\./, "");
     } catch {
       return uri;