fix: the extension page will refresh after clicking the button. We ne…

…ed to add preventDefault to prevent form default behavior. (#1378)

Co-authored-by: George <[email protected]>

api-samples/browsingData/popup.js

@@ -28,7 +28,8 @@ function parseMilliseconds(timeframe) {
   return null;
 }
 
-function buttonClicked() {
+function buttonClicked(event) {
+  event.preventDefault();
   const option = document.getElementById('timeframe');
   let selectedTimeframe = option.value;
   let removal_start = parseMilliseconds(selectedTimeframe);