Change return to break.

content.js

@@ -93,37 +93,44 @@ function messageListener(request, sender, sendResponse) {
         switch(request.message){
             case "update":
                 videoIDChange(getYouTubeVideoID(document.URL));
-              return
+
+                break;
             case "sponsorStart":
                 sponsorMessageStarted(sendResponse);
-              return
+
+                break;
             case "sponsorDataChanged":
                 updateSponsorTimesSubmitting();
-              return
+
-              //send the sponsor times along with if it's found
+                break;
             case "isInfoFound":
+                //send the sponsor times along with if it's found
                 sendResponse({
                     found: sponsorDataFound,
                     sponsorTimes: sponsorTimes,
                     hiddenSponsorTimes: hiddenSponsorTimes,
                     UUIDs: UUIDs
                 });
+
                 if (popupInitialised && document.getElementById("sponsorBlockPopupContainer") != null) {
                     //the popup should be closed now that another is opening
                     closeInfoMenu();
                 }
+
                 popupInitialised = true;
-            return
+                break;
             case "getVideoID":
                 sendResponse({
                     videoID: sponsorVideoID
-            })
+                });
-	    return
+
+                break;
             case "getVideoDuration":
                 sendResponse({
                 duration: v.duration
                 });
-	    return
+
+                break;
             case "skipToTime":
                 v.currentTime = request.time;
                 return
@@ -131,45 +138,56 @@ function messageListener(request, sender, sendResponse) {
                 sendResponse({
                     currentTime: v.currentTime
                 });
-            return
+
+                break;
             case "getChannelURL":
                 sendResponse({
                 channelURL: channelURL
-            })
+                });
-            return
+
+                break;
             case "isChannelWhitelisted":
                 sendResponse({
                     value: channelWhitelisted
-            })
+                });
-            return
+
+                break;
             case "whitelistChange":
                 channelWhitelisted = request.value;
                 sponsorsLookup(sponsorVideoID);
-            return
+
+                break;
             case "dontShowNotice":
                 dontShowNotice = false;
-              return
+
+                break;
             case "changeStartSponsorButton":
                 changeStartSponsorButton(request.showStartSponsor, request.uploadButtonVisible);
-              return
+
+                break;
             case "showNoticeAgain":
                 dontShowNotice = false;
-              return
+                
+                break;
             case "changeVideoPlayerControlsVisibility":
                 hideVideoPlayerControls = request.value;
                 updateVisibilityOfPlayerControlsButton();
-            return
+
+                break;
             case "changeInfoButtonPlayerControlsVisibility":
                 hideInfoButtonPlayerControls = request.value;
                 updateVisibilityOfPlayerControlsButton();
-            return
+
+                break;
             case "changeDeleteButtonPlayerControlsVisibility":
                 hideDeleteButtonPlayerControls = request.value;
                 updateVisibilityOfPlayerControlsButton();
-            return
+
+                break;
             case "trackViewCount":
                 trackViewCount = request.value;
-            return
+
+                break;
         }
 }