ActivityWatch - Open Source Time Tracker

Name: ActivityWatch - Open Source Time Tracker
Rating: 4.6739 (46 reviews)
Author: Erik Bjäreholt

By: Erik Bjäreholt

This extension logs the current tab and your browser activity to ActivityWatch.

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Features & Capabilities

ActivityWatch is a free and open source automatic time-tracking software designed to help you monitor how you spend your time on your computer. This Chrome extension seamlessly integrates with ActivityWatch, enhancing it by logging your current browser tab and overall web activity to provide detailed insights into your online habits.

Please note, this extension requires the ActivityWatch desktop application to be installed on your computer. You can find easy installation instructions and further details at activitywatch.net. By using this extension alongside the main application, you gain a comprehensive view of your digital time management to boost productivity and better understand your browsing patterns.

User Growth & Download Statistics

Add-on Open Source Developer Tools

By:

Daily users:

Rating:

Version:

0.5.2 Last updated: 2025-03-11

Version code:

5908071

Creation date:

2017-10-05

Risk:

Permissions:

tabs
alarms
notifications
activeTab
storage
http://127.0.0.1:5600/api/*
http://127.0.0.1:5666/api/*

Size:

108.19KB

URLs:

Website

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-17

Compare stats and ranking:

Ranking

# 1,591 ▼ 5

Other rankings

#248 in Other extensions ▼ 1

#4 in activity keyword 24

#9 in screentime tracker keyword 6

#10 in screen time tracker keyword 9

#10 in source keyword 20

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For Developers

Monetize with App Pass Boost with Extension Booster

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:

Erik Bjäreholt

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/aw-watcher-web/

Website:

https://forum.activitywatch.net/

Permission Change History

2025-02-25: Version 0.4.8 → 0.5.0

Add Permissions: http://127.0.0.1:5600/api/* http://127.0.0.1:5666/api/*

Remove Permissions: http://localhost:5600/api/* http://localhost:5666/api/*

User Reviews

Users broadly praise ActivityWatch – Open Source Time Tracker Firefox add-on for keeping data locally, being highly customizable, and delivering a positive, easy-to-use experience. The extension is seen as a solid, reliable way to log time with minimal UI clutter. Reviews frequently mention that it connects and syncs quickly and works well. Some reports warn of heavy memory usage in certain setups, and a few users encounter issues with URL recognition or policy-related restrictions that limit Mozilla-hosted versions, requiring forks or workarounds. Overall, sentiment is highly favorable though caveats exist.

Pros

Local storage and privacy
Highly customizable
Strong overall positive sentiment across many reviews
Reliable operation and quick synchronization

Cons

Recent reviews

by Mi*****, 2026-05-12

It's good, but when ActivityWatch's server is down/not launched, this addon keep collecting data and ends up very large memory usage. Also, it seems like this addon causing large amount of disk i/o after pc waking up from sleep. It would be helpful to have parameter to limit this behavior.

by Fi*****, 2026-05-10

This add-on, and generally the program in general, is a great way to log time on the browser, one of the few free ones, and the only free AND good AND completely local one. Great Extension! Very easily customizable and relatively intuitive to use, without the useless UI cluttering of mainstream brands.

by ch*****, 2026-02-15

View all user reviews ›

Is ActivityWatch - Open Source Time Tracker 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.

ActivityWatch - Open Source Time Tracker requires a few sensitive permissions. Exercise caution before installing.

Risk impact analysis details

Critical Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
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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.

ActivityWatch - Open Source Time Tracker has earned a fairly good reputation and likely can be trusted.

Risk likelihood analysis details

High This extension has low user count. Unpopular extensions may not be stable or safe.
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