this fixes #1024

src/js/scriptlets/element-picker.js

@@ -189,6 +189,47 @@ var safeQuerySelectorAll = function(node, selector) {
 
 /******************************************************************************/
 
+var getElementBoundingClientRect = function(elem) {
+    var prect = typeof elem.getBoundingClientRect === 'function' ?
+        elem.getBoundingClientRect() :
+        { height: 0, left: 0, top: 0, width: 0 };
+
+    // https://github.com/gorhill/uBlock/issues/1024
+    // Try not returning an empty bounding rect.
+    if ( prect.width !== 0 && prect.height !== 0 ) {
+        return prect;
+    }
+
+    var left = prect.left,
+        right = prect.right,
+        top = prect.top,
+        bottom = prect.bottom,
+        crect;
+
+    var children = elem.children,
+        i = children.length;
+
+    while ( i-- ) {
+        crect = getElementBoundingClientRect(children[i]);
+        if ( crect.width === 0 || crect.height === 0 ) {
+            continue;
+        }
+        if ( crect.left < left ) { left = crect.left; }
+        if ( crect.right > right ) { right = crect.right; }
+        if ( crect.top < top ) { top = crect.top; }
+        if ( crect.bottom > bottom ) { bottom = crect.bottom; }
+    }
+
+    return {
+        height: bottom - top,
+        left: left,
+        top: top,
+        width: right - left
+    };
+};
+
+/******************************************************************************/
+
 var highlightElements = function(elems, force) {
     // To make mouse move handler more efficient
     if ( !force && elems.length === targetElements.length ) {
@@ -215,10 +256,7 @@ var highlightElements = function(elems, force) {
         if ( elem === pickerRoot ) {
             continue;
         }
-        if ( typeof elem.getBoundingClientRect !== 'function' ) {
-            continue;
-        }
-        rect = elem.getBoundingClientRect();
+        rect = getElementBoundingClientRect(elem);
 
         // Ignore if it's not on the screen
         if ( rect.left > ow || rect.top > oh ||