Commit 929ac90a and 0de0acb3 use the text editor from `app.officejs.com`. Which is not same domain as the main application. When Selenium tests run with Firefox. If Firefox visit a page which contains an iframe from another domain, it is unable to redirect to another link and complaints `Permission denied to access property "href"`. In order to make the test get pass on the server with FIrefox. Revert the changes the that two commits which described above.