Is there a way to alter the size of the ridiculous new Firefox opening screen?

In the previous version of the Firefox opening screen, I had a Google search bar. Below this would be the most popular sites I had visited in a three line grid.

Since the update, the Firefox logo and a huge amount of white space now occupies nearly half the screen before we even get get to the Google search bar. The three line grid of most recent sites has been pushed to the bottom third of the screen and the third line of the grid I actually have to scroll down to see.