Chrome

There are 2 ways to opt out of the new tab page on Chrome.

Pig Menu

If you click on the extension icon (sometimes behind the puzzle icon menu) you can opt out by using the corresponding slider

Chrome Settings

Navigate to chrome://settings/onStartup in the URL bar and click disable. Warning: to re-enable the new tab you will have to reinstall Truffle.

Brave

To opt out on Brave you can't use the pig menu, instead you need to go to brave://settings/ and click disable. Warning: to re-enable the new tab you will have to reinstall Truffle.