Private Notes allows you to write password-protected, fully encrypted notes. Your notes can be synchronized with encrypted (again!) Firefox Sync. engine with other devices. Ideal for storing the most sensitive information, like Recovery codes, Wi-Fi passwords, server configs, etc... Privacy and permissions:

There are no permissions - this addon can't make any remote requests or submit any data!
All data are always encrypted and then synchronized by Firefox build-in End-to-End encrypted "Firefox Sync" engine (yes, data are double encrypted!).
Your password is NOT stored at all. It's hashed using advanced PBKDF2 function with 100k iterations and strong salt.
Unlocked notes and decryption keys are never stored on drive - they stay in the system RAM memory (not accessible by any other app and cleared when browser is closed).
Even if someone gains physical access to your PC, he won't be able to access your notes nor password. This is one of the safest place ever created!

Top features:

Encrypted notes - all your notes are always stored encrypted!
Auto-lock - will help you keep your notes locked when you leave your PC
Automatic backups - each device creates encrypted local backups of your notes. Plus Firefox Sync engine keeps encrypted backup in Firefox cloud.
End to End encryption - all transferred data are again encrypted thanks to Firefox Sync between your Firefox browsers.
No need to create additional account - Firefox Sync will handle everything
Advanced Text Editor - supports many advanced text features
Code highlight for many popular languages and configs
Compression - all notes are compressed to save space

To synchronize your encrypted notes between devices:

enable Firefox Sync feature - just login to your Firefox account using toolbar icon
enable "Add-ons" synchronization - in the Firefox Options page ("about:preferences#sync") on the "Sync" tab check "Add-ons" checkbox

Limitations of Firefox Sync engine:

No Android! Firefox Sync cannot synchronize addons data on Android :(
Firefox Sync can handle only 100KB of data - so you can't store huge notes. However thanks to build in compression, you should be able to store more than 100,000 characters of text.
Single note only 8KB size limit - each note can have only up to 8,000 characters - again thanks to compression this should be more.
Slow synchronization - sometimes it takes several minutes to synchronize your new notes to / from the cloud. You can trigger sync. manually from your account toolbar menu.

Support independent developer:

I'm full-time add-on developer and your donations is my only income. There are no ads in my add-ons! Please support my work by:

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Thank you! :) Your donation will help me keep this add-on working in future versions of Firefox!

Recently added features:

The list of changes in last versions is available here

Tags: private, privacy, note, message, secure, text, sync, synchronization, e2e, encryption, sensitive, Firefox Sync, device, zip, compression, editor, vault, pass, password, crypto, safe