Newer Firefox changed the error name when screensharing is not allowed

Update this so the screen sharing help modal dialog opens correctly

public/js/vroom.js

@@ -2009,11 +2009,12 @@ function initVroom(room) {
           // This error usually means you have denied access (old flag way)
           // or you cancelled screen sharing (new extension way)
           // or you select no window (in Firefox)
-          else if (err.name === 'PermissionDeniedError' && $.browser.mozilla){
+          else if ((err.name === 'PermissionDeniedError' || err.name === 'SecurityError') && $.browser.mozilla){
             $('#firefoxShareScreenModal').modal('show');
           }
           else if (err.name === 'PERMISSION_DENIED' ||
                    err.name === 'PermissionDeniedError' ||
+                   err.name === 'SecurityError' ||
                    err.name === 'ConstraintNotSatisfiedError'){
             cantShare(localize('SCREEN_SHARING_CANCELLED'));
           }