Open-source, minimalistic new tab page extension. Be more productive with bookmarks categorized to custom categories like: Work, Home and more, and if you feel sneaky use the built-in dark theme, or if you fancy more colors - create your own theme!
Some of the Simple Start features:
Bookmark any website you like to.
Categorize your bookmarks.
Synchronize bookmarks and groups between devices - with Firefox Account.
Very customizable - change font size and color, change the icon capsule size and more.
Built-in light and dark theme.
Create your own themes.
For synchronization to work you need to use Firefox Account with bookmarks and extensions synchronization enabled.
You can also report bugs and suggest new features there.