diff --git a/build/tasks/esbuild.js b/build/tasks/esbuild.js
index 30dbeb4ef..ad074a52b 100644
--- a/build/tasks/esbuild.js
+++ b/build/tasks/esbuild.js
@@ -23,6 +23,7 @@ module.exports = function (grunt) {
             entryPoints: [entry],
             outfile: path.join(dest, name),
             minify: false,
+            format: 'esm',
             bundle: true
           })
             .then(done)
diff --git a/lib/commons/dom/create-grid.js b/lib/commons/dom/create-grid.js
index 612e885bb..7af1b0016 100644
--- a/lib/commons/dom/create-grid.js
+++ b/lib/commons/dom/create-grid.js
@@ -27,6 +27,10 @@ export default function createGrid(
 ) {
   // Prevent multiple calls per run
   if (cache.get('gridCreated') && !parentVNode) {
+    // a11y-engine-domforge change
+    if (cache.get('gridSize')) {
+      return cache.get('gridSize');
+    }
     return constants.gridSize;
   }
   cache.set('gridCreated', true);
@@ -110,6 +114,11 @@ export default function createGrid(
 
     node = treeWalker.nextNode();
   }
+
+  // a11y-engine-domforge change
+  if (cache.get('gridSize')) {
+    return cache.get('gridSize');
+  }
   return constants.gridSize;
 }
 
@@ -430,6 +439,10 @@ class Grid {
    * @returns {number}
    */
   toGridIndex(num) {
+    // a11y-engine-domforge change
+    if (cache.get('gridSize')) {
+      return Math.floor(num / cache.get('gridSize'));
+    }
     return Math.floor(num / constants.gridSize);
   }
 
@@ -442,10 +455,18 @@ class Grid {
     assert(this.boundaries, 'Grid does not have cells added');
     const rowIndex = this.toGridIndex(y);
     const colIndex = this.toGridIndex(x);
-    assert(
-      isPointInRect({ y: rowIndex, x: colIndex }, this.boundaries),
-      'Element midpoint exceeds the grid bounds'
-    );
+
+    // a11y-engine-domforge change
+    if (cache.get('ruleId') === 'resize-2x-zoom') {
+      if (!isPointInRect({ y: rowIndex, x: colIndex }, this.boundaries)) {
+        return [];
+      }
+    } else {
+      assert(
+        isPointInRect({ y: rowIndex, x: colIndex }, this.boundaries),
+        'Element midpoint exceeds the grid bounds'
+      );
+    }
     const row = this.cells[rowIndex - this.cells._negativeIndex] ?? [];
     return row[colIndex - row._negativeIndex] ?? [];
   }
diff --git a/lib/commons/dom/get-element-stack.js b/lib/commons/dom/get-element-stack.js
index 132a20f2b..510b7a811 100644
--- a/lib/commons/dom/get-element-stack.js
+++ b/lib/commons/dom/get-element-stack.js
@@ -9,7 +9,9 @@ import createGrid from './create-grid';
  * @param {Node} node
  * @return {Node[]}
  */
-function getElementStack(node) {
+
+// Additional props isCoordsPassed, x, y for a11y-engine-domforge
+function getElementStack(node, isCoordsPassed = false, x = null, y = null) {
   createGrid();
 
   const vNode = getNodeFromTree(node);
@@ -19,7 +21,15 @@ function getElementStack(node) {
     return [];
   }
 
-  return getRectStack(grid, vNode.boundingClientRect);
+  // Additional props isCoordsPassed, x, y for a11y-engine-domforge
+  return getRectStack(
+    grid,
+    vNode.boundingClientRect,
+    false,
+    isCoordsPassed,
+    x,
+    y
+  );
 }
 
 export default getElementStack;
diff --git a/lib/commons/dom/get-overflow-hidden-ancestors.js b/lib/commons/dom/get-overflow-hidden-ancestors.js
index 01ab696e2..79ca04cee 100644
--- a/lib/commons/dom/get-overflow-hidden-ancestors.js
+++ b/lib/commons/dom/get-overflow-hidden-ancestors.js
@@ -1,3 +1,4 @@
+import cache from '../../core/base/cache';
 import memoize from '../../core/utils/memoize';
 
 /**
@@ -17,8 +18,19 @@ const getOverflowHiddenAncestors = memoize(
 
     const overflow = vNode.getComputedStylePropertyValue('overflow');
 
-    if (overflow === 'hidden') {
-      ancestors.push(vNode);
+    // a11y-engine-domforge change
+    if (cache.get('ruleId') && cache.get('ruleId') === 'resize-2x-zoom') {
+      if (
+        overflow.includes('hidden') ||
+        overflow.includes('clip') ||
+        overflow.includes('scroll')
+      ) {
+        ancestors.push(vNode);
+      }
+    } else {
+      if (overflow.includes('hidden')) {
+        ancestors.push(vNode);
+      }
     }
 
     return ancestors.concat(getOverflowHiddenAncestors(vNode.parent));
diff --git a/lib/commons/dom/get-rect-stack.js b/lib/commons/dom/get-rect-stack.js
index 4c51bf3b3..36489a504 100644
--- a/lib/commons/dom/get-rect-stack.js
+++ b/lib/commons/dom/get-rect-stack.js
@@ -1,12 +1,27 @@
 import visuallySort from './visually-sort';
 import { getRectCenter } from '../math';
 
-export function getRectStack(grid, rect, recursed = false) {
+// Additional props isCoordsPassed, x, y for a11y-engine-domforge
+export function getRectStack(
+  grid,
+  rect,
+  recursed = false,
+  isCoordsPassed = false,
+  x = null,
+  y = null
+) {
   const center = getRectCenter(rect);
   const gridCell = grid.getCellFromPoint(center) || [];
 
-  const floorX = Math.floor(center.x);
-  const floorY = Math.floor(center.y);
+  let floorX = Math.floor(center.x);
+  let floorY = Math.floor(center.y);
+
+  // a11y-engine-domforge change
+  if (isCoordsPassed) {
+    floorX = Math.floor(x);
+    floorY = Math.floor(y);
+  }
+
   let stack = gridCell.filter(gridCellNode => {
     return gridCellNode.clientRects.some(clientRect => {
       const rectX = clientRect.left;
diff --git a/lib/commons/dom/get-visible-child-text-rects.js b/lib/commons/dom/get-visible-child-text-rects.js
index 02611798e..2cd01773a 100644
--- a/lib/commons/dom/get-visible-child-text-rects.js
+++ b/lib/commons/dom/get-visible-child-text-rects.js
@@ -1,7 +1,8 @@
 import { getNodeFromTree, memoize } from '../../core/utils';
 import { sanitize } from '../text';
-import { getRectCenter, isPointInRect, getIntersectionRect } from '../math';
+import { getIntersectionRect, getRectCenter, isPointInRect } from '../math';
 import getOverflowHiddenAncestors from './get-overflow-hidden-ancestors';
+import cache from '../../core/base/cache';
 
 /**
  * Get the visible text client rects of a node.
@@ -23,13 +24,21 @@ const getVisibleChildTextRects = memoize(
       }
 
       const contentRects = getContentRects(textNode);
-      if (isOutsideNodeBounds(contentRects, nodeRect)) {
+      if (isOutsideNodeBounds(contentRects, nodeRect) && !cache.get('ruleId')) {
         return;
       }
 
       clientRects.push(...filterHiddenRects(contentRects, overflowHiddenNodes));
     });
 
+    // a11y-engine-domforge change
+    if (
+      clientRects.length <= 0 &&
+      cache.get('ruleId') &&
+      cache.get('ruleId') === 'resize-2x-zoom'
+    ) {
+      return [];
+    }
     /**
      * if all text rects are larger than the bounds of the node,
      * or goes outside of the bounds of the node, we need to use
diff --git a/lib/core/public/load.js b/lib/core/public/load.js
index e80d3d8f6..0d7e0caf4 100644
--- a/lib/core/public/load.js
+++ b/lib/core/public/load.js
@@ -42,7 +42,10 @@ function runCommand(data, keepalive, callback) {
           //a11y-engine iframe rules error merging logic
           const errors = a11yEngine.getErrors();
           if (Object.keys(errors).length !== 0) {
-            if (results[results.length - 1].a11yEngineErrors) {
+            if (
+              results.length > 0 &&
+              results[results.length - 1]?.a11yEngineErrors
+            ) {
               const error = results.pop();
               delete error.a11yEngineErrors;
               const mergedErrors = mergeErrors(error, errors);
diff --git a/lib/core/public/run-rules.js b/lib/core/public/run-rules.js
index 8e04c13dc..9193d4373 100644
--- a/lib/core/public/run-rules.js
+++ b/lib/core/public/run-rules.js
@@ -67,7 +67,10 @@ export default function runRules(context, options, resolve, reject) {
       // after should only run once, so ensure we are in the top level window
       if (context.initiator) {
         // Return a11y-engine errors when at top level window
-        if (results[results.length - 1].a11yEngineErrors) {
+        if (
+          results.length > 0 &&
+          results[results.length - 1]?.a11yEngineErrors
+        ) {
           const error = results.pop();
           delete error.a11yEngineErrors;
           a11yEngine.mergeErrors(error);
diff --git a/lib/core/utils/merge-results.js b/lib/core/utils/merge-results.js
index 0e6277132..79aa935b1 100644
--- a/lib/core/utils/merge-results.js
+++ b/lib/core/utils/merge-results.js
@@ -86,7 +86,7 @@ function mergeResults(frameResults, options) {
 
     const frameSpec = getFrameSpec(frameResult);
     // Extract existing errors and merge with new ones
-    if (results[results.length - 1].a11yEngineErrors) {
+    if (results.length > 0 && results[results.length - 1]?.a11yEngineErrors) {
       const error = results.pop();
       delete error.a11yEngineErrors;
       mergedErrors = mergeErrors(mergedErrors, error, frameSpec);