Firefox Browser Add-ons
  • Extensions
  • Themes
    • for Firefox
    • Dictionaries & Language Packs
    • Other Browser Sites
    • Add-ons for Android
Log in
Preview of Telsia: Eye Strain Reduction

Telsia: Eye Strain Reduction by George Forse

Telsia reduces eye strain with a custom colour overlay which aims to improve readability for users with Scotopic Sensitivity Syndrome, Dyslexia, Photophobia, Visual Stress and more.

5 (1 review)5 (1 review)
11 Users11 Users
Download Firefox and get the extension
Download file

Extension Metadata

About this extension
Telsia provides a clean, fast, and highly customisable colour overlay for your web browser. It is designed to reduce eye strain and improve reading comfort, making it an essential tool for daily browsing and for users with visual sensitivities.

Telsia is a valuable aid for individuals with Scotopic Sensitivity Syndrome, Dyslexia, Photophobia, Visual Stress and other conditions that affect reading on a screen.

Key Features:
  • Full Colour Control: Select any colour with an intuitive picker or input a precise HEX code, such as one recommended by an optician or specialist.
  • Precise Opacity Slider: Instantly adjust the filter's transparency from a subtle tint to a full block of colour.
  • Blend Mode: Select a blend mode for the overlay to use. We recommend Normal for most people, but Multiply is best if you want to preserve contrast of dark text on light backgrounds.
  • Zero Performance Impact: Telsia is incredibly lightweight and optimized for speed, ensuring it never slows down your browsing experience.
  • Enterprise Management: Ideal for schools and businesses. System administrators can centrally configure and manage some of the extension's features and behaviour for their users.
  • Make it yours: Choose from 8 different overlay presets or use your own.

Common Use Cases:
  • Applying a specific reading-aid tint (e.g., yellow, blue, green).
  • Reducing screen glare and setting brightness to below system minimums.
  • Warming the screen colour at night (or any time of day, really) to reduce blue light exposure.
Rated 5 by 1 reviewer
Log in to rate this extension
There are no ratings yet

Star rating saved

5
1
4
0
3
0
2
0
1
0
Read 1 review
Permissions and data

Required permissions:

  • Access your data for all websites

Data collection:

  • The developer says this extension doesn't require data collection.
Learn more
More information
Add-on Links
  • Homepage
  • Support site
  • Support Email
Version
1.2.0
Size
223.44 KB
Last updated
2 months ago (Jan 27, 2026)
Related Categories
  • Other
License
All Rights Reserved
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.