diff --git a/ext/fg/js/client.js b/ext/fg/js/client.js
index 3c75068c..d5ad0c2f 100644
--- a/ext/fg/js/client.js
+++ b/ext/fg/js/client.js
@@ -81,7 +81,7 @@ class Client {
     }
 
     searchAtPoint(point) {
-        const range = getRangeAtPoint(point, 10);
+        const range = getRangeAtPoint(point, this.options.scanLength);
         if (range === null) {
             this.hidePopup();
             return;
diff --git a/ext/fg/js/util.js b/ext/fg/js/util.js
index eb153e9b..4f4bcbd3 100644
--- a/ext/fg/js/util.js
+++ b/ext/fg/js/util.js
@@ -17,7 +17,7 @@
  */
 
 
-function getRangeAtPoint(point, lookAhead) {
+function getRangeAtPoint(point, scanLength) {
     const range = document.caretRangeFromPoint(point.x, point.y);
     if (range === null) {
         return null;
@@ -29,7 +29,7 @@ function getRangeAtPoint(point, lookAhead) {
     }
 
     const offset = range.startOffset;
-    const length = Math.min(node.length - offset, lookAhead);
+    const length = Math.min(node.length - offset, scanLength);
     if (length === 0) {
         return null;
     }