diff --git a/api/HTMLCanvasElement.json b/api/HTMLCanvasElement.json
index b1babc32c56ab1..237bdf7c70edb9 100644
--- a/api/HTMLCanvasElement.json
+++ b/api/HTMLCanvasElement.json
@@ -314,10 +314,12 @@
                 "version_added": false
               },
               "firefox": {
-                "version_added": "63"
+                "version_added": "63",
+                "partial_implementation": true,
+                "notes": "Firefox respects the GPU hint on macOS only."
               },
               "firefox_android": {
-                "version_added": "63"
+                "version_added": false
               },
               "ie": {
                 "version_added": false
@@ -342,7 +344,7 @@
               }
             },
             "status": {
-              "experimental": false,
+              "experimental": true,
               "standard_track": true,
               "deprecated": false
             }