The latest Firefox release features faster page load times and tab switching, improvements to search provider setup, an improved dark theme, better bookmark syncing, and at least eighteen security fixes.
Settings related to the home page and ‘new tab’ page are now in their own section on Firefox’s Options pages. You can access the new section directly using this URL: about:preferences#home.
The Firefox 61.0 release notes provide additional details.
On most computers, Firefox will update itself. You can encourage it by visiting the About page: click the hamburger button, then select