diff --git a/docs/_data/browser-bugs.yml b/docs/_data/browser-bugs.yml
index 78014d042a..4971739107 100644
--- a/docs/_data/browser-bugs.yml
+++ b/docs/_data/browser-bugs.yml
@@ -148,6 +148,16 @@
   origin: >
     Bootstrap#20161
 
+-
+  browser: >
+    Firefox
+  summary: >
+    `min-width: 0` has no effect on `<fieldset>`
+  upstream_bug: >
+    Mozilla#504622
+  origin: >
+    Bootstrap#12359
+
 -
   browser: >
     Firefox (Windows)