diff --git a/files/en-us/mozilla/firefox/experimental_features/index.md b/files/en-us/mozilla/firefox/experimental_features/index.md
index ae9b9a7ad62b93f..2fc3f8ac6f24970 100644
--- a/files/en-us/mozilla/firefox/experimental_features/index.md
+++ b/files/en-us/mozilla/firefox/experimental_features/index.md
@@ -445,6 +445,24 @@ These give developers more flexibility when structuring and loading JavaScript m
 - `dom.multiple_import_maps.enabled`
   - : Set to `true` to enable.
 
+## WebAssembly
+
+### JavaScript Promise Integration
+
+[WebAssembly JavaScript Promise Integration](https://github.com/WebAssembly/js-promise-integration) (JS-PI) allows WebAssembly applications to interoperate with JavaScript APIs that use {{jsxref("Promise")}} objects.
+This lets WebAssembly code suspend while waiting for a JavaScript promise and resume when the promise settles.
+([Firefox bug 2015877](https://bugzil.la/2015877)).
+
+| Release channel   | Version added | Enabled by default? |
+| ----------------- | ------------- | ------------------- |
+| Nightly           | 152           | Yes                 |
+| Developer Edition | -             | -                   |
+| Beta              | -             | -                   |
+| Release           | -             | -                   |
+
+- `javascript.options.wasm_js_promise_integration`
+  - : Set to `true` to enable.
+
 ## APIs
 
 ### Scoped custom element registries
diff --git a/files/en-us/mozilla/firefox/releases/152/index.md b/files/en-us/mozilla/firefox/releases/152/index.md
index 11557586ce2ffcf..948e8d69c04cd05 100644
--- a/files/en-us/mozilla/firefox/releases/152/index.md
+++ b/files/en-us/mozilla/firefox/releases/152/index.md
@@ -75,7 +75,11 @@ Firefox 152 is the current [Beta version of Firefox](https://www.firefox.com/en-
 
 <!-- #### Removals -->
 
-<!-- ### WebAssembly -->
+### WebAssembly
+
+- [WebAssembly JavaScript Promise Integration](https://github.com/WebAssembly/js-promise-integration) (JS-PI) is now available in Nightly builds, where it is enabled by default.
+  This lets WebAssembly code suspend while waiting for JavaScript {{jsxref("Promise")}} objects and resume when the promises settle.
+  ([Firefox bug 2015877](https://bugzil.la/2015877)).
 
 <!-- #### Removals -->
 
@@ -99,10 +103,15 @@ Firefox 152 is the current [Beta version of Firefox](https://www.firefox.com/en-
 
 ## Experimental web features
 
-These features are shipping in Firefox 152 but are disabled by default.
+These features are shipping in Firefox 152 but are disabled by default unless otherwise noted.
 To experiment with them, search for the appropriate preference on the `about:config` page and set it to `true`.
 You can find more such features on the [Experimental features](/en-US/docs/Mozilla/Firefox/Experimental_features) page.
 
+- **WebAssembly JavaScript Promise Integration (JS-PI)**: `javascript.options.wasm_js_promise_integration`
+
+  WebAssembly JavaScript Promise Integration is now available in Nightly builds, where it is enabled by default.
+  ([Firefox bug 2015877](https://bugzil.la/2015877)).
+
 - **Check if a media encoding/decoding configuration is supported for WebRTC**: `media.mediacapabilities.webrtc.enabled`
 
   The `webrtc` type can now be passed as an option for [`MediaCapabilities.decodingInfo()`](/en-US/docs/Web/API/MediaCapabilities/decodingInfo#webrtc) and [`MediaCapabilities.encodingInfo()`](/en-US/docs/Web/API/MediaCapabilities/encodingInfo#webrtc) to check if an encoding/decoding configuration can be used for WebRTC.