Marginalia
Scribbles in the sidebar
Context-aware note-taking that follows you as you browse. Your thoughts, organized automatically by where you are on the web.
Key Features
Smart Organization
Notes automatically organize by page, subdomain, domain, or available everywhere. The right notes appear at the right time, based on where you are on the web.
Cross-Device Sync
Sign in once and access your notes on any device with real-time sync. Your thoughts travel with you, always up to date across all your browsers.
Always There
Side panel interface means your notes are just a click away, never interrupting your workflow. Clean, modern design that stays out of your way.
Works Offline
Take notes without internet connection. They'll automatically sync when you reconnect. Your workflow never stops.
How It Works
Install and Sign In
Install the extension from your browser's store and create an account
Open Your Sidebar
Click the extension icon to open your notes sidebar
Start Typing
Notes save automatically in the right context based on your current page
Switch and See
Navigate to different sites and watch relevant notes appear instantly
Technical Details
Platform Support
Available for Chrome, Brave, and Firefox browsers using modern extension APIs and side panel integration.
Backend Infrastructure
Powered by Google Firebase with Firestore Database for cloud storage and Firebase Authentication for secure user accounts. All data transmission uses encrypted HTTPS with industry-standard security practices.
Offline-First Architecture
Local caching using browser extension storage APIs ensures your notes are always accessible, with automatic background sync when connected.
Screenshots
Screenshots coming soon
Installation
Chrome & Brave
Available on the Chrome Web Store
Store link coming soon
Firefox
Available on Firefox Add-ons (AMO)
Add-on link coming soon
Privacy & Security
Your privacy matters. Marginalia uses industry-standard security practices and is fully compliant with GDPR and CCPA.
Read Privacy Policy