Add a note just in case people run into adblocker problems

CHANGELOG.md

@@ -4,6 +4,8 @@ All notable changes to this project will be documented in this file.
 
 ## [Unreleased]
 
+- Add note about adblockers potentially blocking the popup
+
 ## [v0.5.0] - 2021-10-01
 
 - No more command line options, all configuration is now app-managed

web/index.html

@@ -17,6 +17,9 @@
             Drag this bookmarklet: <a href="{{ .BookmarkletURL }}">Gropple</a> to your bookmark bar, and click it
             on any page you want to grab the video from.
         </p>
+	<p>
+	    Please note that some adblockers may prevent the bookmarklet from opening the popup window.
+	</p>
     </div>
 
     <table class="pure-table">