published version in webstore

content.js

@@ -6,6 +6,16 @@ if (window.__dewemoji_cs_installed) {
     window.__dewemoji_cs_installed = true;
     // (keep the rest of your file below as-is)
 
+    // Throttle to animation frame to avoid excessive work on rapid events
+    function rafThrottle(fn){
+      let scheduled = false;
+      return function(...args){
+        if (scheduled) return;
+        scheduled = true;
+        requestAnimationFrame(() => { scheduled = false; fn.apply(this,args); });
+      };
+    }
+
     let lastEditable = null;    // HTMLElement (input/textarea/contenteditable root)
     let lastRange = null;       // Range for contenteditable
     let lastStart = 0, lastEnd = 0;
@@ -59,10 +69,17 @@ if (window.__dewemoji_cs_installed) {
 
     captureCaret();
 
+    // Use a non-throttled handler for focusin so we snapshot *before* focus leaves to the side panel.
     document.addEventListener('focusin', captureCaret, true);
-    document.addEventListener('keyup', captureCaret, true);
-    document.addEventListener('mouseup', captureCaret, true);
-    document.addEventListener('selectionchange', captureCaret, true);
+
+    // Throttled handlers for noisy updates
+    const captureCaretThrottled = rafThrottle(captureCaret);
+    document.addEventListener('keyup', captureCaretThrottled, true);
+    document.addEventListener('mouseup', captureCaretThrottled, true);
+    document.addEventListener('selectionchange', captureCaretThrottled, true);
+
+    // Extra safety: when the page is about to hide (e.g., side panel opens), keep the last known caret
+    document.addEventListener('visibilitychange', () => { if (document.visibilityState === 'hidden') captureCaret(); }, true);
 
     // Attempt to insert text at the last saved position
     function insertAtCaret(text) {