| Index: lib/csp.js | 
| diff --git a/lib/csp.js b/lib/csp.js | 
| index 5309863ab1bb65b9f8a5318d44ef723d0a6d49e9..6f43c352d9681613ef881fe3a187c2a17969a6ec 100644 | 
| --- a/lib/csp.js | 
| +++ b/lib/csp.js | 
| @@ -17,11 +17,11 @@ | 
|  | 
| "use strict"; | 
|  | 
| -let {defaultMatcher} = require("matcher"); | 
| -let {BlockingFilter, RegExpFilter} = require("filterClasses"); | 
| -let {getDecodedHostname} = require("url"); | 
| +const {defaultMatcher} = require("matcher"); | 
| +const {BlockingFilter, RegExpFilter} = require("filterClasses"); | 
| +const {getDecodedHostname} = require("url"); | 
|  | 
| -chrome.webRequest.onHeadersReceived.addListener(function(details) | 
| +chrome.webRequest.onHeadersReceived.addListener(details => | 
| { | 
| let hostname = getDecodedHostname(new URL(details.url)); | 
| let match = defaultMatcher.matchesAny("", RegExpFilter.typeMap.WEBSOCKET, | 
|  |