Font Contrast

Name: Font Contrast
Rating: 4.375 (88 reviews)
Author: Francesco Fusco

By: Francesco Fusco Add-on

Improves webpage readability.

Overview

Firefox Add-ons Store

Daily users

805 ▲ 1

Data as of 2026-07-30

Rating:

4.38

(88)

Version:

1.6.1

Last updated: 2024-01-14

Features & Capabilities

Font Contrast is a free and open-source Chrome extension designed to improve the readability of webpages. It combats the trend of hard-to-read text on websites by turning light or faint text to black or darker shades, enlarging small fonts, and increasing font boldness for better clarity. The extension is lightweight and efficient, ensuring smooth performance even on large websites.

Users can easily toggle the readability enhancements via the icon or a convenient keyboard shortcut (default: Shift+F1). Additionally, it provides an address bar button to quickly customize settings for specific websites. This program is released under the GNU General Public License v3.0, making it not only free to use but also open for contributions and modifications. For users who find Font Contrast helpful, there is an option to support its development via donations.

User Growth & Download Statistics

Add-on Accessibility Open Source

By:

Daily users:

Rating:

Version:

1.6.1 Last updated: 2024-01-14

Version code:

5677339

Creation date:

2017-07-29

Risk:

Permissions:

http://*/*
https://*/*
storage
tabs
file:///*

Size:

198.24KB

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-07-30

Compare stats and ranking:

Ranking

# 3,630 ▼ 1

Other rankings

#352 in Tabs ▲ 1

#5 in trash keyword 8 ▲ 2

#9 in font keyword 54

#86 in license keyword 3 ▼ 1

#92 in improve keyword 34

Upgrade to see more rankings

Other platforms

Font Contrast (v1.6.6)

572 4.17

(6)

Font Contrast (v1.6.6)

147 5.00

(1)

For Developers

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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:

Francesco Fusco

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/font-contrast-fix/

User Reviews

Font Contrast is praised for greatly improving text readability on many sites and offering strong per-site customization, which helps users with visual impairments. It remains effective when properly configured and provides a handy toolbar toggle. However, reports of media blocking on some sites and a hard-to-see icon on dark themes indicate reliability/UI quirks. Overall, its value depends on careful setup and site compatibility, but it can be a powerful accessibility/readability tool when it works well.

Pros

Significantly improves readability by increasing contrast on low-contrast sites, reducing eye strain.
Accessibility benefits for users with visual impairments (e.g., achromatopsia, macular degeneration).
Highly configurable with per-site options (blacklist, font-size adjustments) for fine-tuning across websites.
Convenient UX features, including a toolbar toggle for quick on/off and reliable performance once configured.

Cons

Occasional blocking of images or videos on certain sites (disrupts site functionality).
Icon visibility issues on dark themes (the extension icon can be hard to see or invisible).

Recent reviews

by Fi*****, 2026-04-18

Works for me, but kills my usercontent settings for link colors, even if setting "ignore colorful text" is enabled.

by sd*****, 2026-03-12

View all user reviews ›

Is Font Contrast 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.

Font Contrast requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk impact analysis details

Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
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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.

Font Contrast 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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