diff --git a/html/elements/a.json b/html/elements/a.json
index 0e7377767de1dc..e2b6a577a44bf5 100644
--- a/html/elements/a.json
+++ b/html/elements/a.json
@@ -207,7 +207,11 @@
               "firefox": {
                 "version_added": "20"
               },
-              "firefox_android": "mirror",
+              "firefox_android": {
+                "version_added": "20",
+                "partial_implementation": true,
+                "notes": "Only supports `blob:` and `data:` URI schemes. Other schemes are ignored."
+              },
               "ie": {
                 "version_added": false
               },