Circadian

Overview

A browser extension that tints pages by time of day (daytime, sunset, bedtime).

Circadian is really simple. It creates an invisible element over your whole web page, then applies a CSS filter to it! There's a bit of math involved to calculate the RGB values from the blackbody radiation scale, but that's essentially it! Philosophy: Blue-light impacts our sleep and overall health by disrupting melanopsin receptor's normal function that calibrates our circadian rhythm. This extension's creation was inspired by f.lux's ability to adjust your device's color profile temperature based on the time of day to aid in preventing this. It's not perfect (this extension definitely isn't) but it's a simple tool many users use to help. The idea: I was checking out some dark reader Firefox addons when I asked myself if any of these dark reader addons had temperature adjustments? I suspect not. And if I were to make an extension, I could use Orion on my iPhone to install my extension and essentially get f.lux on my iPhone! (Apple shut down f.lux's app) Obviously it's not system wide, but still kinda neat! You can even pair Circadian with other dark reader extensions to get the best experience!

0 out of 5
No ratings
Learn more about results and reviews.

Details

Version
1.0.4
Updated
November 10, 2025
Flag concern
Offered by
Pas
Size
68.68KiB
Languages
English
Developer
Email
psteam.bulldog471@slmails.com
Non-trader
This developer has not identified itself as a trader. For consumers in the European Union, please note that consumer rights do not apply to contracts between you and this developer.

Privacy

Manage extensions and learn how they're being used in your organization

The developer has disclosed that it will not collect or use your data.

This developer declares that your data is

Not being sold to third parties, outside of the approved use cases
Not being used or transferred for purposes that are unrelated to the item's core functionality
Not being used or transferred to determine creditworthiness or for lending purposes

Support

Color Eyedropper

5.0

Pick colors from web pages, color picker and your personal color history.

Classic Dark Theme for Web

4.7

Dark Mode a classic dark theme for all websites. Switch for night and day browsing

Page Color Inverter

3.7

Invert the colors of any webpage for a darker browsing experience.

Dark Mode for Chrome

4.5

Dark mode for all websites. Use dark theme for night and daily browsing with dark reader. Night shift mode.

Blur. The Image and Video blur extension

4.6

A browser extension that blurs all images on a page, for when you want to be discreet or don't want to look at certain images.

Midnight Dark mode - Dark theme Chrome

4.5

Turn on dark mode across all websites. Customize dark theme and brightness. Dark reader - dark skin for Chrome.

Blue Light Filter - Cross-Browser Eye Protection & Sleep Enhancement

3.4

Advanced blue light filter with smart scheduling, real-time activation, and cross-browser support for healthier screen time.

ReaDark - Reading & Dark Mode

4.1

ReaDark - Reading & Dark Mode for turning all websites in Chrome browser to reading or dark mode or both.

Dark Reader - Dark Mode for Chrome

4.5

Turn on dark mode for Chrome. Take care of your eyes, and use a dark theme for the night and daily browsing.

Brightness Control

0.0

The Adjust Brightness extension enhances your web browsing experience

Adjust Screen Brightness

3.0

This extension reduces the screen brightness level for both daytime and night time

Adjust Page Brightness

4.0

Control your browser's global screen brightness to use sites that do not support the native dark theme