diff --git a/index.html b/index.html
index f84ab63..c674a7b 100644
--- a/index.html
+++ b/index.html
@@ -198,9 +198,12 @@ <h3><center>Let's Get Started!</center></h3>
 				<div class="navItem"tabIndex="70" data-href="https://icons8.com" id="attribution-loadingio">
 					New Account, Sign-in, and other icons by Icons8
 				</div>				
-				<div class="navItem"tabIndex="80" id="attribution-appLogo">
-					Special thanks to contributor <b>david-p-s</b> for his contributions to early code development!
+				<div class="navItem"tabIndex="80" id="attribution-david">
+					Special thanks to contributor <b>david-p-s</b> for his contributions to early code development as well as feature contributions and suggestions!
 				</div>
+				<div class="navItem"tabIndex="90" id="attribution-swampfox">
+					Special thanks to fellow cacher <b>Swamp_Fox_In_PA</b> for his excellent contributions in testing the app and providing suggestions and feedback!
+				</div>				
 			</div>
 		</div>
 		
diff --git a/manifest.webmanifest b/manifest.webmanifest
index f1eb12b..441dbd1 100644
--- a/manifest.webmanifest
+++ b/manifest.webmanifest
@@ -44,7 +44,7 @@
   ],
 
     "b2g_features": {
-	  "version": "4.22",
+	  "version": "4.23",
     "developer": {
       "name": "canyouswim",
       "url": "https://caching-on-kai.com"