Who is Popup Dictionary for?

Popup Dictionary is an open-source project built for firefox users who need quick dictionary lookups.

Does Popup Dictionary have a free plan?

Yes — Popup Dictionary is free to use.

What platforms does Popup Dictionary run on?

Popup Dictionary runs on the web and embeddable surfaces.

Is Popup Dictionary still maintained?

Unverified. Popup Dictionary 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 Popup Dictionary?

Similar projects tracked by PulseGate include Dictionary Plus, Quick Define, and Tooltip Dictionary.

Who makes Popup Dictionary?

Popup Dictionary is developed by Jonas Hogman.

When did Popup Dictionary launch?

Popup Dictionary first shipped in 2020.

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Popup Dictionary

Name: Popup Dictionary
Author: Jonas Hogman

github.comBrowser DevTools & extensions

Popup Dictionary is an open-source Firefox WebExtension that displays dictionary definitions for selected words in a browser popup. It provides Google Dictionary-like lookup functionality for Firefox users.

FreeWebEmbeddableCloud-managed

Visit github.com

Overview

4 features

Popup Dictionary sits in PulseGate's Browser DevTools & extensions category. It focuses on looking up word definitions while browsing without leaving the current page. It is built as an open-source project for firefox users who need quick dictionary lookups. It is available for free. It ships for the web and embeddable surfaces.

It is developed by Jonas Hogman, and it first shipped in 2020. Among its 4 catalogued features are word lookup, popup definitions, and text selection.

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

Word lookup
Popup definitions
Text selection
Firefox integration

Built with & integrations

Runs on

BrowserEmbeddableCloud-managed

Trust & compliance

Verified signals

HTTPSPrivacy Policy Terms of ServiceFree tierStore-verified publisher

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed17 Sep · 07:00 UTC
Popup Dictionary verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about Popup Dictionary

What does Popup Dictionary do?: Popup Dictionary focuses on looking up word definitions while browsing without leaving the current page. It is catalogued under Browser DevTools & extensions on PulseGate.
Who is Popup Dictionary for?: Popup Dictionary is an open-source project built for firefox users who need quick dictionary lookups.
Does Popup Dictionary have a free plan?: Yes — Popup Dictionary is free to use.
What platforms does Popup Dictionary run on?: Popup Dictionary runs on the web and embeddable surfaces.
Is Popup Dictionary still maintained?: Unverified. Popup Dictionary 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 Popup Dictionary?: Similar projects tracked by PulseGate include Dictionary Plus, Quick Define, and Tooltip Dictionary.Dictionary Plus Quick Define Tooltip Dictionary
Who makes Popup Dictionary?: Popup Dictionary is developed by Jonas Hogman.
When did Popup Dictionary launch?: Popup Dictionary first shipped in 2020.

At a glance

Pricing: Free
Platforms: Web
Languages: English
First seen: 17 Sep 2026
Built for: Firefox users who need quick dictionary lookups
Model: Open source
Solves: Looking up word definitions while browsing without leaving the current page.

Registered as

Firefox Add-ons: popup-dictionary

Developer

Jonas Hogman

Index record

Indexed: 17 Sep 2026
Lifecycle: Alive
First seen: Sep 2026
Last seen: 17 Sep 2026

Identity audit (13)

Slug: popup-dictionary-github-com
Lifecycle state recorded: 17 Sep 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 17 Sep 2026
Timeline basis: Indexed-at chronology (no inferred launch/funding milestones).
Name from: Written by a language model from the project's public pages.
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: 17 Sep 2026
Canonical URL: https://github.com/JonasHogman/firefox-dictionary

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