I have filed the bug at [https://landfill.bugzilla.org/bugzilla-3.0-branch/show_bug.cgi?id=6827[Landfill Bugzilla]].

In this lab I am doing the same as previous lab. However, I am using extension to do it. [http://zenit.senecac.on.ca/wiki/index.php/Image:Addtabbeside.xpi[Download]] my XPI file and check it.