Replace calls to deprecated function

core/interceptor.js

@@ -71,7 +71,7 @@ interceptor.handleRequest = function (requestDetails, tabIdentifier, tab) {
     };
 
     return {
-        'redirectUrl': chrome.extension.getURL(targetPath + fileGuard.secret)
+        'redirectUrl': chrome.runtime.getURL(targetPath + fileGuard.secret)
     };
 };
 

core/main.js

@@ -56,7 +56,7 @@ main._showReleaseNotes = function (details) {
 
     let location, previousVersion, setting;
 
-    location = chrome.extension.getURL('pages/welcome/welcome.html');
+    location = chrome.runtime.getURL('pages/welcome/welcome.html');
 
     if (details.reason === chrome.runtime.OnInstalledReason.INSTALL ||
         details.reason === chrome.runtime.OnInstalledReason.UPDATE) {