diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -1 +1 @@
-* `caret-read-progress.js` - highlights the line/position while reading a text - move back/forth with left/right arrows.
+* `caret-read-progress.js` - highlights the line/position while reading a text - move back/forth with left/right arrows. (in Caret Browsing Mode)