# plexiglass

> This add-on is meant to help web developers challenge themselves to manually test their pages for accessibility. It adds options to turn off mouse interactions and add an opaque overlay to pages to encourage keyboard and screen reader testing.

Canonical page: [https://chrome-stats.com/d/plexiglass](https://chrome-stats.com/d/plexiglass)

## Overview

- **ID:** `plexiglass`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Madalyn Parker
- **Category:** web-development
- **Daily users:** 1
- **Version:** 1.0
- **Last updated:** 2020-01-10
- **First published:** 2020-01-09
- **Size:** 15 KB
- **Data as of:** 2026-09-09
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/plexiglass/)
- **Website:** [https://github.com/madalynrose/plexiglass/tree/master/mozilla-plexiglass](https://github.com/madalynrose/plexiglass/tree/master/mozilla-plexiglass)

## Description

Plexiglass is a Firefox add-on that helps web developers manually test their pages for accessibility. It enables navigation using only the keyboard and encourages screen reader usage by overlaying the screen. Inspired by Marcy Sutton's no-mouse-days library.

## Rankings

- #96,907 — Overall

## Permissions and access

### Permissions

- `activeTab`
- `cookies`
- `<all_urls>`

## Safety

- **Risk impact:** Moderate risk impact
- **Risk likelihood:** Moderate risk likelihood

### Analysis details

- Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
- This extension has low user count. Unpopular extensions may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

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Source: [Chrome-Stats](https://chrome-stats.com/d/plexiglass)