HatsuneMikuEditor by Vadim Khristenko (VAI_PROG)

A new tab page in the palettes of the HatsuneMikuEditor themes for code editors.
Four layouts:
Stage: a big clock as the song title, an equalizer, search and a setlist of shortcuts.
Score: your day on a music staff, every event is a note, shortcuts are piano keys.
Bento: a grid of widgets you can rearrange.
Zen: wallpaper first, a clock in the corner and one search line.
Search takes plain queries, addresses and more than 10 000 built-in !bangs (the Helium list), plus your own engines and bangs. Widgets: clock, weather, calendar with events, shortcuts, tasks, now playing for audible tabs, a focus timer, a note and a line of the day. Greetings change with the time of day and the season, and the page remembers your birthday.
Shortcut icons come from where you choose: the site itself, DuckDuckGo, Google, or plain letters.
Privacy: no account, no analytics, no ads. Weather and remote icons are optional and Firefox asks before either sends anything. Everything else stays in your browser.
On Firefox for Android the page opens from the Extensions menu, because Android does not let add-ons replace the new tab.
Russian, English and Chinese. Open source under MIT.