Firefox Browser Add-ons
  • Extensions
  • Themes
    • for Firefox
    • Dictionaries & Language Packs
    • Other Browser Sites
    • Add-ons for Android
Log in
Preview of CF Stopwatch

CF Stopwatch by pratikrkcha

Automatically tracks how long you spend on each Codeforces problem. Stops on Accepted, survives tab switches, and lets you reattempt with one click. Blends seemlessly with your codeforces theme.

0 (0 reviews)0 (0 reviews)
Download Firefox and get the extension
Download file

Extension Metadata

Screenshots
Dark modeLight modeAccepted
About this extension
CF Stopwatch is a lightweight and distraction-free timer designed specifically for Codeforces users. It helps you track your problem-solving time with a clean interface that blends perfectly with the Codeforces UI.

🚀 Key Features

No-Panic Mode
When you open a problem, the timer waits for at least one minute before starting automatically. This gives you time to calmly read and understand the problem before the clock begins.

Manual Start Option
Prefer to start the timer yourself? You can start it anytime with a single click.

Auto Freeze on Accepted
As soon as your solution is accepted, the timer automatically freezes, preserving your exact solving time.

Persistent Timer
The timer continues running even if you switch tabs or navigate within Codeforces — no interruptions, no resets.

Native Codeforces Look & Feel
The UI is designed to match Codeforces perfectly, so it feels like a built-in feature rather than an add-on.
Rated 0 by 0 reviewers
Log in to rate this extension
There are no ratings yet

Star rating saved

5
0
4
0
3
0
2
0
1
0
No reviews yet
Permissions and data

Required permissions:

  • Access your data for codeforces.com

Data collection:

  • The developer says this extension doesn't require data collection.
Learn more
More information
Version
1.0.0
Size
32.07 KB
Last updated
6 days ago (Feb 26, 2026)
Related Categories
  • Other
License
Mozilla Public License 2.0
Version History
  • See all versions
Add to collection
Report this add-on
Go to Mozilla's homepage

Add-ons

  • About
  • Firefox Add-ons Blog
  • Extension Workshop
  • Developer Hub
  • Developer Policies
  • Community Blog
  • Forum
  • Report a bug
  • Review Guide

Browsers

  • Desktop
  • Mobile
  • Enterprise

Products

  • Browsers
  • VPN
  • Relay
  • Monitor
  • Pocket
  • Bluesky (@firefox.com)
  • Instagram (Firefox)
  • YouTube (firefoxchannel)
  • Privacy
  • Cookies
  • Legal

Except where otherwise noted, content on this site is licensed under the Creative Commons Attribution Share-Alike License v3.0 or any later version.