| Index: chrome/content/ui/subscriptionSelection.js | 
| =================================================================== | 
| --- a/chrome/content/ui/subscriptionSelection.js | 
| +++ b/chrome/content/ui/subscriptionSelection.js | 
| @@ -217,7 +217,7 @@ | 
| let link = document.createElement("label"); | 
| link.className = "text-link"; | 
| link.setAttribute("tooltiptext", mainSubscriptionURL); | 
| -    link.addEventListener("click", function() UI.loadInBrowser(mainSubscriptionURL), false); | 
| +    link.addEventListener("click", () => UI.loadInBrowser(mainSubscriptionURL), false); | 
| link.textContent = mainSubscriptionTitle; | 
| messageElement.appendChild(link); | 
| messageElement.appendChild(document.createTextNode(afterLink)); | 
| @@ -304,5 +304,5 @@ | 
|  | 
| function hasSubscription(url) | 
| { | 
| -  return FilterStorage.subscriptions.some(function(subscription) subscription instanceof DownloadableSubscription && subscription.url == url); | 
| +  return FilterStorage.subscriptions.some(subscription => subscription instanceof DownloadableSubscription && subscription.url == url); | 
| } | 
|  |