Countdown Calendar Firefox

Countdown Calendar

By: Ryan C.
Year calendar with the ability to mark dates to countdown to/from, and set a primary countdown for the icon badge.

Features & Capabilities

Lightning-Fast. Private. Purpose-Built.

⏰ Lightweight & instant! Mark dates, track countdowns, and stay organized—no data collected, fully local, and blazing-fast!

🚀 Why Countdown Calendar? A featherweight powerhouse for your productivity! Designed to run seamlessly without slowing down your browser, Countdown Calendar puts your privacy first. All data stays 100% local—no tracking, no accounts, no bloat.

🌟 Key Features:

⚡ Lightweight & Snappy: Built for speed! The calendar loads instantly, reacts without lag, and runs entirely offline.

🔒 Privacy Guaranteed: Your dates stay on your device. No data is shared, sold, or stored on external servers.

📅 Dynamic Calendar Grid: Jump between decades, highlight weekends, and mark dates with one click—all in a clean, minimalist interface.

🎯 Primary Date Focus: Right-click any saved date to set it as your #1 priority. Watch a live badge countdown in your toolbar!

⏱️ Instant Time Insights: Hover over dates for smart tooltips (e.g., “5 days left” or “3 weeks ago”).

📌 Today Marker: A 📅 emoji highlights the current day for quick reference.

🔎 Decade Navigation: Effortlessly browse years with an intuitive range selector.

💡 Perfect For:

Busy professionals tracking deadlines.

Students counting down to exams or vacations.

Planners organizing weddings, milestones, or fitness goals.

Anyone who values speed, simplicity, and privacy.

User Growth & Download Statistics

Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.
Developed by:
Ryan C.
Firefox Add-ons Store
https://addons.mozilla.org/firefox/addon/countdown-calendar/
Email:
*****@ryanchuang.com
Website:
https://www.ryanchuang.com

User Reviews

extension does literally nothing. you can mark a date, thats it. Are you guys trolling us with these countdown extension? Clowncity
by ma*****, 2026-02-17
View all user reviews ›

Is Countdown Calendar Safe?

Risk impact
Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

Countdown Calendar does not require any sensitive permissions.

Risk impact analysis details
Risk likelihood
Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

Countdown Calendar may not be trust-worthy. Avoid installing if possible unless you really trust this publisher.

Risk likelihood analysis details
  • High This extension support email may not be valid
  • High **** ********* ******* *** *** ** *******
  • High **** ********* *** *** **** ****** ********* ********** *** *** ** ****** ** *****
  • Medium **** ********* *** *** **** *******
  • Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
  • Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
Extension Guard
Extension Guard

Discover every extension in use, analyze risks, and enforce blocking policies with Extension Guard

Secure Your Browser
Upgrade to see full risk analysis details

Best Countdown Calendar Alternatives

Here are some Firefox add-ons that are similar to Countdown Calendar: