What is New Tab Override?
New Tab Override was developed from the ground up as so-called WebExtension. This makes New Tab Override compatible with Firefox 57 and later. Not all options of the previous version are currently available as WebExtension. As soon as Mozilla implements support for missing functionalities in Firefox, they will be integrated in a future update of New Tab Override.
You have to re-configure the add-on. After the update the settings page will automatically be opened.
Features
change the new tab page to whatever web accesible URL you like
use a blank page as new tab page
use about:home, the default home page of Firefox, as new tab page
use your current home page as new tab page
use any color as background color for the new tab page
store a local HTML file in the extension's storage and use the content as new tab content
get the latest news about Mozilla as new tab page (only in German language)
set the focus either to the address bar or to the web page (for example Google search field)
beautiful settings UI to make it easy to customize your new tab experience
automatically prepend http:// if protocol is missing
can be used together with the container tabs feature of Firefox
alexkopachov added New Tab Override as alternative to SvelTab
POX added New Tab Override as alternative to Blooft
divyeshlakhotia added New Tab Override as alternative to Browspire
Comments and Reviews
change the new tab page to whatever web accesible URL you like