Sidebar Notebook — MrSuperfluous

A lightweight, local-first notebook that lives directly in the Firefox sidebar. Built for developers who
want to jot down notes, code snippets, and ideas without leaving the browser.

• VS Code-style file tree with nested pages
• Markdown editor with live preview and syntax-highlighted code blocks
• Jupyter-style notebook cells mode (Shift+Enter to add cells)
• Command palette (Ctrl+P to search pages, Ctrl+K for commands)
• Vim keybindings (toggleable)
• One-click copy on code blocks
• Fuzzy search across all page titles and content
• Scratchpad mode for quick temporary notes
• Collapsible sidebar to maximize writing space
• Dark theme by default, light mode follows system preference
• Real-time autosave — never lose a keystroke
• Export/import all pages as JSON
• Completely offline — all data stored locally in IndexedDB
• No accounts, no cloud, no tracking

KEYBOARD SHORTCUTS

Ctrl+P — Search/switch pages
Ctrl+K — Command palette
Ctrl+N — New page
Ctrl+S — Force save
Ctrl+B — Toggle file tree
Ctrl+E — Cycle view mode (edit → split → preview → cells)
Shift+Enter — New cell (in cells mode)

PRIVACY

All data stays on your machine. Zero network requests. Zero telemetry. Zero data collection.