automaticDark - Time-Based Theme Changer

Name: automaticDark - Time-Based Theme Changer
Rating: 4.4427 (192 reviews)
Author: simonkhzhang

Automatically change Firefox's theme based on the time.

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automaticDark is a Firefox WebExtension designed to enhance your browsing experience by automatically switching themes based on the time of day. Enjoy a dark theme during nighttime to reduce eye strain and a light theme during the day for optimal visibility.

This extension offers multiple configuration options including automatic calculation of sunrise and sunset times using your geolocation, manual setting of these times, or switching themes according to your operating system's theme. It's a simple yet effective tool to keep your browser's appearance comfortable and adaptive without manual intervention.

For support and feedback, users can contact the developer via email or submit issues on GitHub. If you find the extension useful, consider leaving a rating or review to support its development.

Productivity Utilities Design

By:

Daily users:

Rating:

Version:

1.4.1 Last updated: 2023-02-28

Version code:

5530426

Creation date:

2017-11-17

Risk:

Permissions:

alarms
browserSettings
management
storage
theme

Size:

202.17K

Email:

si*****@gmail.com

URLs:

Website

Full description:

See detailed description ⏷

Source:

Firefox Browser Add-ons

Updated:

14 hours ago

Ranking

# 655 ▲ 2

Other rankings

#33 in Appearance ▲ 1

#1 in airtime keyword 15

#1 in automate keyword 58

#1 in automation keyword 26

#1 in base keyword 10

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Publisher Change History

2024-06-09: Email was changed from si*****@gmail.com to si*****@gmail.com

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User reviews

Users praise the add-on for instantly working on PC Mozilla browsers, bug-free operation with some browsers, and customizable themes synced with system dark mode. However, many report that automatic theme switching often fails, particularly on Linux and recent Firefox/macOS versions. Some note the add-on stops working after initial use, lacks Android support, and manual time settings are unreliable. Overall, the add-on's concept is appreciated, but technical issues limit consistent functionality across platforms.

Pros

Instantly starts working on PC with Mozilla browser without any setup issues.
No bugs reported; works perfectly with some browsers like Zen browser.
Allows setting a custom Firefox theme to match Windows system dark mode.
Provides manual time-based theme changes when automatic system theme sync isn't functioning well.

Cons

The 'change theme based on system theme' option frequently does not work, especially on Linux and some Windows versions.
Auto theme switching stops working after one occurrence or doesn't work at all on certain setups.
Lack of support for Android devices is noted and requested by users.
Incompatibility issues with recent Firefox versions (e.g., Firefox 129) and macOS Sonoma 14.6.

Recent reviews

by MfG, 2025-05-13

by einwolfsregen, 2025-05-03

by จูบจิ๋มที่ริมบึง, 2025-04-25

View all user reviews ›

Extension safety

Risk impact

automaticDark - Time-Based Theme Changer requires very minimum permissions.

Risk impact analysis details

Medium Manages other extensions, which allows oversight but might intervene with user configurations and choices.

Risk likelihood

automaticDark - Time-Based Theme Changer has earned a fairly good reputation and likely can be trusted.

Risk likelihood analysis details

Medium This extension has medium user count. Unpopular extensions may not be stable or safe.
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