the work on the idea already began during hauke jan lubbers' bachelor at the cooperative state university baden-wurttemberg in stuttgart, where he wrote a firefox add-on to identify and block cross-site-scripting (xss) attacks on the client-side.

Please write the text above using proper case.
The work on the idea already began during Hauke Jan Lubbers' bachelor at the Cooperative State University Baden-Wurttemberg in Stuttgart, where he wrote a Firefox add-on to identify and block cross-site-scripting (XSS) attacks on the client-side.