Clicking New users guide should always load the welcome page but once this page is loaded and next is not loaded

Clicking New users guide should always load the welcome page but once this page is loaded and next is not loaded.

1. Click My Friends
2. Click New users guide
3. Click My Friends
4. Click New users guide
5. Click My Friends
6. Click New users guide
   ...
   Sometimes Welcome page is loaded sometimes not.

Verify in Firefox.