diff --git a/components/script/dom/htmlformelement.rs b/components/script/dom/htmlformelement.rs
index 6d37719a862..2bf414828b0 100644
--- a/components/script/dom/htmlformelement.rs
+++ b/components/script/dom/htmlformelement.rs
@@ -209,7 +209,8 @@ impl HTMLFormElement {
                 load_data.data = Some(parsed_data.into_bytes());
             },
             // https://html.spec.whatwg.org/multipage/#submit-get-action
-            ("ftp", _) | ("javascript", _) | ("data", FormMethod::FormGet) => (),
+            ("file", _) | ("about", _) | ("data", FormMethod::FormGet) |
+            ("ftp", _) | ("javascript", _) => (),
             _ => return // Unimplemented (data and mailto)
         }
 
diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index e2b7aa33d2d..93c437588d4 100644
--- a/tests/wpt/mozilla/meta/MANIFEST.json
+++ b/tests/wpt/mozilla/meta/MANIFEST.json
@@ -5451,6 +5451,12 @@
             "url": "/_mozilla/mozilla/follow-hyperlink.html"
           }
         ],
+        "mozilla/form_submit_about.html": [
+          {
+            "path": "mozilla/form_submit_about.html",
+            "url": "/_mozilla/mozilla/form_submit_about.html"
+          }
+        ],
         "mozilla/getBoundingClientRect.html": [
           {
             "path": "mozilla/getBoundingClientRect.html",
diff --git a/tests/wpt/mozilla/tests/mozilla/form_submit_about.html b/tests/wpt/mozilla/tests/mozilla/form_submit_about.html
new file mode 100644
index 00000000000..ec572ab0bc6
--- /dev/null
+++ b/tests/wpt/mozilla/tests/mozilla/form_submit_about.html
@@ -0,0 +1,15 @@
+<html>
+    <head>
+        <script src=/resources/testharness.js></script>
+        <script src=/resources/testharnessreport.js></script>
+    </head>
+    <body>
+        <iframe src="form_submit_about_frame.html" id="foo"></iframe>
+        <script>
+            var numOnLoads = 0
+            var t = async_test("about:blank as form target")
+            var iframe = document.getElementById('foo')
+            iframe.onload = t.step_func(function(e) { if (++numOnLoads == 2) t.done() })
+        </script>
+    </body>
+</html>
diff --git a/tests/wpt/mozilla/tests/mozilla/form_submit_about_frame.html b/tests/wpt/mozilla/tests/mozilla/form_submit_about_frame.html
new file mode 100644
index 00000000000..7beb90f1ab7
--- /dev/null
+++ b/tests/wpt/mozilla/tests/mozilla/form_submit_about_frame.html
@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html>
+    <body>
+        <form name="my" action="about:blank">
+            <input type="submit" value="Submit about:blank"/>
+        </form>
+        <script>
+            window.onload = function() {
+                document.forms["my"].submit();
+            }
+        </script>
+    </body>
+</html>
