When I start Firefox it loads its default Home page, then about 10 seconds later it's replaced by FVD. Any way to prevent Firefox Home page from loading and have FVD load immediately like it does in Chrome?

What is the version of your Firefox. Your OS? Maybe it happens because you have a slow PC? or laptop?

Thanks for following up

FF = 61.0.2

Win10

16 gigs of RAM i7-7700

Happened with Win7 on a Core2 Duo as well

I am a member of Nimbus :).

Can we get your backup? 

It can happen because of number of dials and groups.

Did you try this?

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