Who should use Notes on Sidebar?

Notes on Sidebar is a consumer product built for firefox users who need in-browser note-taking.

Does Notes on Sidebar have a free plan?

Yes — Notes on Sidebar is free to use.

What platforms does Notes on Sidebar run on?

Notes on Sidebar runs on the web, embeddable surfaces, macOS, Windows, and Linux.

Is Notes on Sidebar still active?

Unverified. Notes on Sidebar has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.

What projects are similar to Notes on Sidebar?

Similar projects tracked by PulseGate include Sidebar Note, Margin, and Highlighter + Notes.

Who develops Notes on Sidebar?

Notes on Sidebar is developed by chung.

How long has Notes on Sidebar been around?

Notes on Sidebar first shipped in 2026.

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Notes on Sidebar

Name: Notes on Sidebar
Author: chung

mozilla.orgBrowser DevTools & extensions

Notes on Sidebar is a Firefox extension that opens a sidebar for taking notes while viewing web pages. It is a fork of the unmaintained Notes by Firefox extension and includes an experimental sync feature.

FreeWebEmbeddablemacOSWindowsLinux

Visit mozilla.org

Overview

4 features

Notes on Sidebar sits in PulseGate's Browser DevTools & extensions category. It focuses on taking and organizing notes while browsing web pages without leaving Firefox. It is built as a consumer product for firefox users who need in-browser note-taking. Notes on Sidebar is free to use. Notes on Sidebar is available on the web, embeddable surfaces, macOS, Windows, and Linux.

It is developed by chung, and it first shipped in 2026. Among its 4 catalogued features are sidebar notes, webpage note-taking, and experimental sync. The interface is available in 32 languages, including Czech, German, and Greek.

Summary written by a language model from the project’s public pages.

Sidebar notes
Webpage note-taking
Experimental sync
Firefox integration

Built with & integrations

Runs on

BrowserEmbeddablemacOSWindowsLinux

Trust & compliance

Verified signals

HTTPSPrivacy Policy Terms of ServiceFree tierMulti-languageStore-verified publisher

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed27 Aug · 15:48 UTC
Sidebar Notes verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about Notes on Sidebar

What does Notes on Sidebar do?: Notes on Sidebar focuses on taking and organizing notes while browsing web pages without leaving Firefox. It is catalogued under Browser DevTools & extensions on PulseGate.
Who should use Notes on Sidebar?: Notes on Sidebar is a consumer product built for firefox users who need in-browser note-taking.
Does Notes on Sidebar have a free plan?: Yes — Notes on Sidebar is free to use.
What platforms does Notes on Sidebar run on?: Notes on Sidebar runs on the web, embeddable surfaces, macOS, Windows, and Linux.
Is Notes on Sidebar still active?: Unverified. Notes on Sidebar has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.
What projects are similar to Notes on Sidebar?: Similar projects tracked by PulseGate include Sidebar Note, Margin, and Highlighter + Notes.Sidebar Note Margin Highlighter + Notes
Who develops Notes on Sidebar?: Notes on Sidebar is developed by chung.
How long has Notes on Sidebar been around?: Notes on Sidebar first shipped in 2026.

At a glance

Pricing: Free
Platforms: Web
First seen: 27 Aug 2026
Built for: Firefox users who need in-browser note-taking
Model: B2C
Solves: Taking and organizing notes while browsing web pages without leaving Firefox.

Registered as

Firefox Add-ons: notes-on-sidebar

Developer

chung

Index record

Indexed: 27 Aug 2026
Lifecycle: Alive
First seen: Aug 2026
Last seen: 27 Aug 2026

Identity audit (13)

Slug: sidebar-notes-mozilla-org
Lifecycle last checked: 8 Sept 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 27 Aug 2026
Timeline basis: Indexed-at chronology (no inferred launch/funding milestones).
Name from: Derived from the project's own page and URL.
Category from: Assigned by a language model.
Summary from: Written by a language model from public pages.
Languages from: Detected by a language model, checked against the page's own declaration.
Last updated: 27 Aug 2026
Canonical URL: https://addons.mozilla.org/en-US/firefox/addon/notes-on-sidebar

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