I have the opposite problem. How to set Speeddial as my home page. Now it opens to the Firefox default homepage.

Under review

1
Go to the extension settings and copy the address
http://nimb.ws/H1W7qP

2
Open Firefox Settings
http://nimb.ws/cokXtr

3
Select Home page settings

Replace options.html with newtab.html
http://nimb.ws/CMxYdg