Who is Annotator for?

Annotator is a consumer product built for students, researchers, and writers.

Does Annotator have a free plan?

Yes — Annotator is free to use.

What platforms does Annotator run on?

Annotator runs on the web and embeddable surfaces.

Is Annotator still active?

Unverified. Annotator 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 Annotator?

Similar projects tracked by PulseGate include Web page annotator, Web Page Annotator, and Voice Notes & Audio Recorder.

Annotator is developed by rabbitxone.

When did Annotator launch?

Annotator first shipped in 2025.

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Annotator

Name: Annotator
Author: rabbitxone

mozilla.orgRead-it-later & curation

Annotator is a Firefox extension that lets users highlight text on websites and attach personal notes. It provides annotation colors, a popup listing annotations on the current page, editing in a full-page view, and navigation to selected annotations, with data stored locally on the device.

FreeWebEmbeddable

Visit mozilla.org

Overview

8 features

In the Read-it-later & curation space, Annotator takes a focused approach. It focuses on keeping research highlights and notes organized while browsing websites. It is built as a consumer product for students, researchers, and writers. It is available for free. It ships for the web and embeddable surfaces.

Behind Annotator is rabbitxone, and it first shipped in 2025. Among its 8 catalogued features are text highlighting, personal notes, and annotation colors. The interface is available in 32 languages, including Czech, German, and Greek.

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

Text highlighting
Personal notes
Annotation colors
Context menu access
Annotation popup
Full-page view
Annotation navigation
Local storage

Built with & integrations

Runs on

BrowserEmbeddable

Trust & compliance

Verified signals

HTTPSPrivacy Policy Terms of ServiceFree tierMulti-languageStore-verified publisher

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed15 Sep · 05:22 UTC
Annotator verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about Annotator

What does Annotator do?: Annotator focuses on keeping research highlights and notes organized while browsing websites. It is catalogued under Read-it-later & curation on PulseGate.
Who is Annotator for?: Annotator is a consumer product built for students, researchers, and writers.
Does Annotator have a free plan?: Yes — Annotator is free to use.
What platforms does Annotator run on?: Annotator runs on the web and embeddable surfaces.
Is Annotator still active?: Unverified. Annotator 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 Annotator?: Similar projects tracked by PulseGate include Web page annotator, Web Page Annotator, and Voice Notes & Audio Recorder.Web page annotator Web Page Annotator Voice Notes & Audio Recorder
Who makes Annotator?: Annotator is developed by rabbitxone.
When did Annotator launch?: Annotator first shipped in 2025.

At a glance

Pricing: Free
Platforms: Web
Built for: students, researchers, and writers
Model: B2C
Solves: Keeping research highlights and notes organized while browsing websites.

Registered as

Firefox Add-ons: annotator

Developer

rabbitxone

Index record

Indexed: 15 Sep 2026
Lifecycle: Alive
Last seen: 15 Sep 2026

Identity audit (13)

Slug: annotator-mozilla-org
Lifecycle state recorded: 15 Sep 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 15 Sep 2026
Timeline basis: Indexed-at chronology. This listing's first-seen date was written by the catalog backfill, not observed here, so it is not treated as a sighting.
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: 15 Sep 2026
Canonical URL: https://addons.mozilla.org/en-US/firefox/addon/annotator

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