Mobile Dyslexic is a Firefox extension designed to improve web accessibility for individuals with dyslexia. This subscription-based tool replaces standard fonts with the OpenDyslexic typeface, which features weighted bottoms and increased letter spacing to enhance readability. These modifications assist users in recognizing individual letters and their orientation, making it a beneficial resource for those affected by dyslexia.

Upon installation, Mobile Dyslexic is automatically enabled and can be easily toggled on or off using the 'D' button on desktop or through the main menu on mobile devices. While it strives to offer a consistent reading experience, users may encounter some web pages that do not render correctly due to the enforced font changes. The extension is available for Firefox on desktop and can be accessed on Firefox for Android Nightly, although standard Android versions may have installation limitations.