diff --git a/docs/_data/browser-bugs.yml b/docs/_data/browser-bugs.yml
index 3629143fe675..94b9773b44fa 100644
--- a/docs/_data/browser-bugs.yml
+++ b/docs/_data/browser-bugs.yml
@@ -98,6 +98,16 @@
   origin: >
     Bootstrap#18365
 
+-
+  browser: >
+    Firefox
+  summary: >
+    Fire `transitioncancel` event when a transition is canceled
+  upstream_bug: >
+    Mozilla#1264125
+  origin: >
+    Mozilla#1182856
+
 -
   browser: >
     Firefox (Windows)