Who is Simple Calendar for?

Simple Calendar is a consumer product built for firefox users who need a lightweight offline calendar.

Does Simple Calendar have a free plan?

Yes — Simple Calendar is free to use.

What platforms does Simple Calendar run on?

Simple Calendar runs on the web and embeddable surfaces.

Is Simple Calendar still active?

Unverified. Simple Calendar 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 Simple Calendar?

Similar projects tracked by PulseGate include Calendar, Calendar Extension for Google Calendar™, and Simple-Calculator.

Who develops Simple Calendar?

Simple Calendar is developed by Morreriar.

When did Simple Calendar launch?

Simple Calendar first shipped in 2025.

Back to the index

Simple Calendar

Name: Simple Calendar
Author: Morreriar

mozilla.orgCalendars, reminders & holidays

Simple Calendar is a lightweight Firefox extension that displays a full monthly calendar, highlights the current date, and supports navigation between months. It works offline and is intended for users who want quick date reference within their browser.

FreeWebEmbeddable

Visit mozilla.org

1alternative

5features

2025since

Overview

5 features

Simple Calendar sits in PulseGate's Calendars, reminders & holidays category. It focuses on checking dates and navigating monthly calendars without leaving the Firefox browser. It is built as a consumer product for firefox users who need a lightweight offline calendar. Simple Calendar is free to use. It runs on the web and embeddable surfaces.

It is developed by Morreriar, and it first shipped in 2025. Among its 5 catalogued features are monthly calendar, current date highlight, and month navigation. The interface is available in 32 languages, including Czech, German, and Greek.

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

Monthly calendar
Current date highlight
Month navigation
Weekday labels
Offline mode

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

Indexed11 Sep · 22:42 UTC
Simple Calendar verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about Simple Calendar

What is Simple Calendar?: Simple Calendar focuses on checking dates and navigating monthly calendars without leaving the Firefox browser. It is catalogued under Calendars, reminders & holidays on PulseGate.
Who is Simple Calendar for?: Simple Calendar is a consumer product built for firefox users who need a lightweight offline calendar.
Does Simple Calendar have a free plan?: Yes — Simple Calendar is free to use.
What platforms does Simple Calendar run on?: Simple Calendar runs on the web and embeddable surfaces.
Is Simple Calendar still active?: Unverified. Simple Calendar 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 Simple Calendar?: Similar projects tracked by PulseGate include Calendar, Calendar Extension for Google Calendar™, and Simple-Calculator.Calendar Calendar Extension for Google Calendar™Simple-Calculator
Who develops Simple Calendar?: Simple Calendar is developed by Morreriar.
When did Simple Calendar launch?: Simple Calendar first shipped in 2025.

At a glance

Pricing: Free
Platforms: Web
Built for: Firefox users who need a lightweight offline calendar
Model: B2C
Solves: Checking dates and navigating monthly calendars without leaving the Firefox browser.

Registered as

Firefox Add-ons: simple-calendar-hehe

Developer

Morreriar

Index record

Indexed: 11 Sep 2026
Lifecycle: Alive
Last seen: 11 Sep 2026

Identity audit (13)

Slug: simple-calendar-mozilla-org
Lifecycle state recorded: 11 Sept 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 11 Sept 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: 11 Sept 2026
Canonical URL: https://addons.mozilla.org/en-US/firefox/addon/simple-calendar-hehe

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