Text Legibility

Text Legibility

Makes illegible webpages legible by adjusting text size, contrast, and links.

Text Legibility promo image
What is Text Legibility?

Text Legibility is a Firefox add-on that improves web page readability by automatically adjusting font sizes, text contrast, and link visibility. It allows you to set your preferred parameters for legibility and enhances text legibility in three ways: scaling text sizes, adjusting text contrast, and enhancing link visibility. Enjoy a better web experience with Text Legibility.

Stats date:
Users: 45 ▼ -1
Rating: 3.79 (43)
Version: 2.0.4 (Last updated: 2016-12-30)
Creation date: 2016-12-03
Weekly download count: 2
Firefox on Android: Yes
Manifest version: 2
  • storage
Size: 30.14K
Email: Click to see
Risk impact: Moderate risk impact
Risk likelihood: Low risk likelihood

Other platforms

Not available on Chrome
Not available on Edge

Are you fed up straining to read web pages with tiny, gray text? Legibility makes web pages easy to read by automatically adjusting font sizes, text contrast, and link visibility. In short, it makes any web page legible. Imagine that, easy to read and no more fiddling with the zoom setting! Once you set a preferred text size and contrast, Legibility adjusts every web page to your personal parameters for legibility.

While adjusting text sizes and contrasts, Legibility preserves the size and color design elements of the web page. Font size relationships are maintained, along with hue relationships. And, unlike using zoom, only text is affected. Photos and graphic elements keep their sizes and positions.

Text legibility is improved in three ways. First, the dominant visible text is scaled to your preferred size. This allows you to read the bulk of the page without strain. You also set minimum and maximum font sizes. Any text that falls outside this range is brought into range, while other sizes are scaled to retain their original size relationships.

Second, text contrast is adjusted to fall within the range you specify. Have you noticed the proliferation of websites designed with gray-on-white text, or worse, dark-gray on light-gray? Such sites are a struggle for anyone with a visual impairment or older than middle age. Legibility will automatically fix the contrast, while keeping the hues of text and background. Contrast can be further increased by a setting that darkens the edge of each character.

Third, link visibility and discoverability can be enhanced with contrasting colors, underlines, and highlights.

Other features: • Shortcuts to quickly increase/decrease text size, or see the unaltered page • Instant response to any adjustment made in the Settings window or with keyboard • The current preferred text size shows in the toolbar

See more
User reviews
It is configurable and it seems to work well for me for the time being. It indeed makes the text more readable (more than what the "Font Contrast" add-on does). The 1 star down is because there is no way to set options per site (whitelist/blacklist etc) and also (as the developer says in User Guide): 1. The add-on is now abandonware so no more updates to keep up with changes in websites 2. The developer uses obscured javascript code to deter intellectual property theft and for this the add-on was going to be removed in 2019 from the official firefox add-on page. For some reason it is still available however.
by Giorgos, 2023-08-15
View all user reviews
Risk impact

Text Legibility may not be safe to use and it requires some risky permissions. Exercise caution when installing this add-on. Review carefully before installing.

Risk likelihood

Text Legibility has earned a fairly good reputation and likely can be trusted.

Upgrade to see risk analysis details