Browser-Bugs.md

@@ -160,8 +160,41 @@ in our issue tracker.
   MathJax workaround: Use the names *-Regular or *-Italic as the font family.
 
 * [MathML bugs](https://bugs.webkit.org/show_bug.cgi?id=84019)
-  Webkit MathML support is still in development and has never be used by default
-  in MathJax. So let's wait a bit before listing the details here.
+  MathML support in Webkit is still experimental and incomplete. Below are some bugs or missing features
+  that may prevent people from using its native MathML support.
+
+  * Multi-character and some Unicode <mi>s italic in WebKit but not Firefox
+  See [bug 44208](https://bugzilla.mozilla.org/show_bug.cgi?id=44208)
+
+  * msub/msup do not stretch operators
+  See [bug 47780](https://bugzilla.mozilla.org/show_bug.cgi?id=47780)
+
+  * Scriptlevel attribute implementation
+  See [bug 49309](https://bugzilla.mozilla.org/show_bug.cgi?id=49309)
+
+  * MathML operators not stretched horizontally
+  See [bug 72828](https://bugzilla.mozilla.org/show_bug.cgi?id=72828)
+
+  * Add support for menclose element
+  See [bug 85729](https://bugzilla.mozilla.org/show_bug.cgi?id=85729)
+
+  * Add support for mpadded element
+  See [bug 85730](https://bugzilla.mozilla.org/show_bug.cgi?id=85730)
+
+  * Add support for mtable@rowspacing and mtable@columnspacing
+  See [bug 85731](https://bugzilla.mozilla.org/show_bug.cgi?id=85731)
+
+  * Add support for mlabeledtr element
+  See [bug 85732](https://bugzilla.mozilla.org/show_bug.cgi?id=85732)
+
+  * Add support for @href attribute in MathML
+  See [bug 85733](https://bugzilla.mozilla.org/show_bug.cgi?id=85733)
+
+  * Add support for the maction element
+  See [bug 85734](https://bugzilla.mozilla.org/show_bug.cgi?id=85734)
+
+  * Add support for @mathvariant attribute
+  See [bug 85735](https://bugzilla.mozilla.org/show_bug.cgi?id=85735)
 
 ## Opera