double-check message existence on end headers

threadvis · Aug 31, 2024 · 68b8a44 · 68b8a44
1 parent 9a152b0
commit 68b8a44
Showing 1 changed file with 5 additions and 3 deletions.
diff --git a/src/chrome/content/threadvis.mjs b/src/chrome/content/threadvis.mjs
@@ -181,9 +181,11 @@ export class ThreadVis {
     }
 
     onEndHeaders() {
-        this.#setSelectedMessage(this.#window.gMessage, true);
-        // make sure we correctly underline recipients (as header is re-drawn)
-        this.#visualisation.recolourAuthors();
+        if (this.#window.gMessage) {
+            this.#setSelectedMessage(this.#window.gMessage, true);
+            // make sure we correctly underline recipients (as header is re-drawn)
+            this.#visualisation.recolourAuthors();
+        }
     }
 
     get window() {