--- a/dom/base/nsRange.cpp
+++ b/dom/base/nsRange.cpp
@@ -262,17 +262,17 @@ nsRange::IsNodeSelected(nsINode* aNode, 
           } else if (middle >= 1 &&
               (middleMinus1 = selection->GetRangeAt(middle - 1)) &&
               nsContentUtils::ComparePoints(
                 aNode, static_cast<int32_t>(aStartOffset),
                 middleMinus1->GetEndContainer(),
                 static_cast<int32_t>(middleMinus1->EndOffset())) < 0) {
             result = -1;
           } else {
-            return false;
+            break;
           }
         }
 
         if (result < 0) {
           high = middle;
         } else {
           low = middle + 1;
         }