Easy Speed Dial is a browser extension that replaces the new tab page with a colorful grid of your bookmarks and folders.

Bookmarks and folders that you already have in the browser are used for display in the Easy Speed Dial grid.
No configuration is required, but many customizations are available.
A curated collection of backgrounds is available. You can also select a favorite photo from your device.
Light and dark color schemes are available. Your device preference is used by default, but you can change it, if desired.
Yes, your privacy is respected. Bookmarks are stored on your device and never leave the browser. Easy Speed Dial uses the bookmarks permission to access your bookmarks and folders for display, and it uses the storage permission to save customizations.
Yes, a custom thumbnail can be set by right-clicking on a dial and selecting 'Select custom thumbnail'. Remove a thumbnail by right-clicking and selecting 'Clear custom thumbnail'. Thumbnails created for Vivaldi speed dials work great with Easy Speed Dial.
At this time there isn't an option to capture a screenshot of a website for a dial's background.
Yes, a custom dial color can be set by right-clicking on a dial and selecting 'Edit'.
To edit bookmarks and folders, right-click a dial and select 'Edit'.
Easy Speed Dial uses browser bookmarks. To create a new dial, just bookmark a page as usual. You can also create a new bookmark or folder by right-clicking anywhere on the Easy Speed Dial page and selecting 'New Bookmark' or 'New Folder'.
Right-click anywhere on the Easy Speed Dial page and select 'Customize'.
Dial colors and thumbnails are saved by the ID of the bookmark. A backup will restore dial colors and thumbnails for only the browser profile it was backed up from because each profile has different bookmark IDs. If you have a new browser installation or profile, you will need to set the dial colors and thumbnails again.