Ember Tab by Lumine

Ember Tab brings shortcuts, a Dock, search and wallpapers to your Firefox new tab. It supports bookmark import, local images, online wallpapers, ZIP backups and HTTPS WebDAV.

Independently maintained from Aura Tab by nil-byte under its MIT license; not affiliated with the original author or Mozilla.
Source: https://github.com/nil-byte/aura-tab
Project and support: https://github.com/LJure/ember-tab

Wallhaven supports random SFW images and collections; private collections require your own API key. Pexels requires your own API key. Local images and basic new-tab features need no service account. Online features connect directly to selected websites and services; see the privacy policy.

Local image files are not synced by Firefox Sync; use ZIP or WebDAV backups to transfer them. Simultaneous edits on multiple devices are not automatically merged. Export a backup before restoring data.

中文介绍
Ember Tab 是基于 Aura Tab 的非官方 Firefox 新标签页扩展，提供快捷链接、Dock、搜索、书签导入、本地及在线壁纸、ZIP 备份与 HTTPS WebDAV。独立维护，保留上游 MIT 许可证，与原作者及 Mozilla 无隶属关系。
Wallhaven 支持随机 SFW 壁纸和指定收藏集；私有收藏集及 Pexels 需使用个人 API Key。在线功能直接连接所选网站或服务，详见隐私说明。本地图片需通过 ZIP 或 WebDAV 迁移；首版不支持双设备同时编辑的自动冲突合并，恢复前请另存当前备份。