diff --git a/browser_patches/firefox-beta/BUILD_NUMBER b/browser_patches/firefox-beta/BUILD_NUMBER
index b0777bbad0..946d188523 100644
--- a/browser_patches/firefox-beta/BUILD_NUMBER
+++ b/browser_patches/firefox-beta/BUILD_NUMBER
@@ -1,2 +1,2 @@
-1281
-Changed: joel.einbinder@gmail.com Tue 24 Aug 2021 12:02:01 PM PDT
+1282
+Changed: joel.einbinder@gmail.com Wed 25 Aug 2021 08:16:37 AM PDT
diff --git a/browser_patches/firefox-beta/juggler/content/PageAgent.js b/browser_patches/firefox-beta/juggler/content/PageAgent.js
index 427fc0fbc0..a007fdb853 100644
--- a/browser_patches/firefox-beta/juggler/content/PageAgent.js
+++ b/browser_patches/firefox-beta/juggler/content/PageAgent.js
@@ -140,6 +140,7 @@ class PageAgent {
         describeNode: this._describeNode.bind(this),
         dispatchKeyEvent: this._dispatchKeyEvent.bind(this),
         dispatchMouseEvent: this._dispatchMouseEvent.bind(this),
+        dispatchWheelEvent: this._dispatchWheelEvent.bind(this),
         dispatchTouchEvent: this._dispatchTouchEvent.bind(this),
         dispatchTapEvent: this._dispatchTapEvent.bind(this),
         getContentQuads: this._getContentQuads.bind(this),
@@ -760,6 +761,26 @@ class PageAgent {
     }
   }
 
+  async _dispatchWheelEvent({x, y, button, deltaX, deltaY, deltaZ, modifiers }) {
+    const deltaMode = 0; // WheelEvent.DOM_DELTA_PIXEL
+    const lineOrPageDeltaX = deltaX > 0 ? Math.floor(deltaX) : Math.ceil(deltaX);
+    const lineOrPageDeltaY = deltaY > 0 ? Math.floor(deltaY) : Math.ceil(deltaY);
+
+    const frame = this._frameTree.mainFrame();
+
+    frame.domWindow().windowUtils.sendWheelEvent(
+      x,
+      y,
+      deltaX,
+      deltaY,
+      deltaZ,
+      deltaMode,
+      modifiers,
+      lineOrPageDeltaX,
+      lineOrPageDeltaY,
+      0 /* options */);
+  }
+
   async _insertText({text}) {
     const frame = this._frameTree.mainFrame();
     frame.textInputProcessor().commitCompositionWith(text);
diff --git a/browser_patches/firefox-beta/juggler/protocol/PageHandler.js b/browser_patches/firefox-beta/juggler/protocol/PageHandler.js
index 4754c38f25..6eafe94c33 100644
--- a/browser_patches/firefox-beta/juggler/protocol/PageHandler.js
+++ b/browser_patches/firefox-beta/juggler/protocol/PageHandler.js
@@ -354,6 +354,10 @@ class PageHandler {
     return await this._contentPage.send('dispatchMouseEvent', options);
   }
 
+  async ['Page.dispatchWheelEvent'](options) {
+    return await this._contentPage.send('dispatchWheelEvent', options);
+  }
+
   async ['Page.insertText'](options) {
     return await this._contentPage.send('insertText', options);
   }
diff --git a/browser_patches/firefox-beta/juggler/protocol/Protocol.js b/browser_patches/firefox-beta/juggler/protocol/Protocol.js
index 9ebf15b013..21421574f7 100644
--- a/browser_patches/firefox-beta/juggler/protocol/Protocol.js
+++ b/browser_patches/firefox-beta/juggler/protocol/Protocol.js
@@ -911,6 +911,16 @@ const Page = {
         buttons: t.Number,
       }
     },
+    'dispatchWheelEvent': {
+      params: {
+        x: t.Number,
+        y: t.Number,
+        deltaX: t.Number,
+        deltaY: t.Number,
+        deltaZ: t.Number,
+        modifiers: t.Number,
+      }
+    },
     'insertText': {
       params: {
         text: t.String,
diff --git a/browser_patches/firefox/BUILD_NUMBER b/browser_patches/firefox/BUILD_NUMBER
index e165966fec..026b2f0172 100644
--- a/browser_patches/firefox/BUILD_NUMBER
+++ b/browser_patches/firefox/BUILD_NUMBER
@@ -1,2 +1,2 @@
-1286
-Changed: joel.einbinder@gmail.com Mon 23 Aug 2021 08:45:33 PM PDT
+1287
+Changed: joel.einbinder@gmail.com Wed 25 Aug 2021 08:15:20 AM PDT
diff --git a/browser_patches/firefox/juggler/content/PageAgent.js b/browser_patches/firefox/juggler/content/PageAgent.js
index 427fc0fbc0..a007fdb853 100644
--- a/browser_patches/firefox/juggler/content/PageAgent.js
+++ b/browser_patches/firefox/juggler/content/PageAgent.js
@@ -140,6 +140,7 @@ class PageAgent {
         describeNode: this._describeNode.bind(this),
         dispatchKeyEvent: this._dispatchKeyEvent.bind(this),
         dispatchMouseEvent: this._dispatchMouseEvent.bind(this),
+        dispatchWheelEvent: this._dispatchWheelEvent.bind(this),
         dispatchTouchEvent: this._dispatchTouchEvent.bind(this),
         dispatchTapEvent: this._dispatchTapEvent.bind(this),
         getContentQuads: this._getContentQuads.bind(this),
@@ -760,6 +761,26 @@ class PageAgent {
     }
   }
 
+  async _dispatchWheelEvent({x, y, button, deltaX, deltaY, deltaZ, modifiers }) {
+    const deltaMode = 0; // WheelEvent.DOM_DELTA_PIXEL
+    const lineOrPageDeltaX = deltaX > 0 ? Math.floor(deltaX) : Math.ceil(deltaX);
+    const lineOrPageDeltaY = deltaY > 0 ? Math.floor(deltaY) : Math.ceil(deltaY);
+
+    const frame = this._frameTree.mainFrame();
+
+    frame.domWindow().windowUtils.sendWheelEvent(
+      x,
+      y,
+      deltaX,
+      deltaY,
+      deltaZ,
+      deltaMode,
+      modifiers,
+      lineOrPageDeltaX,
+      lineOrPageDeltaY,
+      0 /* options */);
+  }
+
   async _insertText({text}) {
     const frame = this._frameTree.mainFrame();
     frame.textInputProcessor().commitCompositionWith(text);
diff --git a/browser_patches/firefox/juggler/protocol/PageHandler.js b/browser_patches/firefox/juggler/protocol/PageHandler.js
index 4754c38f25..6eafe94c33 100644
--- a/browser_patches/firefox/juggler/protocol/PageHandler.js
+++ b/browser_patches/firefox/juggler/protocol/PageHandler.js
@@ -354,6 +354,10 @@ class PageHandler {
     return await this._contentPage.send('dispatchMouseEvent', options);
   }
 
+  async ['Page.dispatchWheelEvent'](options) {
+    return await this._contentPage.send('dispatchWheelEvent', options);
+  }
+
   async ['Page.insertText'](options) {
     return await this._contentPage.send('insertText', options);
   }
diff --git a/browser_patches/firefox/juggler/protocol/Protocol.js b/browser_patches/firefox/juggler/protocol/Protocol.js
index 9ebf15b013..21421574f7 100644
--- a/browser_patches/firefox/juggler/protocol/Protocol.js
+++ b/browser_patches/firefox/juggler/protocol/Protocol.js
@@ -911,6 +911,16 @@ const Page = {
         buttons: t.Number,
       }
     },
+    'dispatchWheelEvent': {
+      params: {
+        x: t.Number,
+        y: t.Number,
+        deltaX: t.Number,
+        deltaY: t.Number,
+        deltaZ: t.Number,
+        modifiers: t.Number,
+      }
+    },
     'insertText': {
       params: {
         text: t.String,