Even with solid dark background color you still get white flashes. Clearly this needs to be solved at a deeper level than waiting for some HTML & CSS to load.

10*****

What's the point if the url bar is already filled and each time I have to clear it first to browse

There are various version of this extension on the Mozilla Addons store, but this is the only one I've used that actually works properly.

A certain other extension loads your url in the extension address space which breaks things.

This extension works exactly as you'd expect.

This is a great add-on for me. I like my new tabs to open to a page I want. I was having some trouble today about it taking longer to open, so I removed the add-on and found that there was an updated version. It's back to working perfectly without a restart needed.

Bem prática, acaba com o "incômodo" de clicar no botão da página inicial ou ter que digitá-la.

Thank you