As other stated, does not work with a local file/homepage.

just white page

Didn't seem to work at first, until I found out that due to Firefox restrictions, local files cannot be handled by add-ons. My homepage was a local file... I solved that by adding it to my (local) web server. A warning that local files are not allowed would have been useful!

İşini basitçe yapıyor. Yeni sekme sayfasında başlangıç sayfasını görmekten hoşlanıyorsanız yüklemelisiniz.

I received a very quick and precise answer. Searching the web previously had answered questions I didn't ask. I am delighted. Thank you Ben.

This add-on was easy and fast to install and did exactly what it said it would do. Now when I open a new tab it is my homepage -Perfect!