diff --git a/webassembly/jspi.json b/webassembly/jspi.json
index 8fa04c843e3f54..8adb783d8fb1d6 100644
--- a/webassembly/jspi.json
+++ b/webassembly/jspi.json
@@ -16,7 +16,14 @@
           },
           "edge": "mirror",
           "firefox": {
-            "version_added": false
+            "version_added": "152",
+            "flags": [
+              {
+                "type": "preference",
+                "name": "javascript.options.wasm_js_promise_integration",
+                "value_to_set": "true"
+              }
+            ]
           },
           "firefox_android": "mirror",
           "oculus": "mirror",