JAWS repeats gridcell content twice in Firefox

[joelamyman]

Brief summary

In Firefox, when using JAWS to navigate through an ARIA grid component, JAWS will announce the contents of each grid cell twice, repeating in a confusing and verbose experience.

Steps to reproduce

1. Open Firefox
2. Navigate to https://cdpn.io/pen/debug/jEqXVvJ/1764e75bb1dde1dee6eb41b69407228c
3. Press Tab until focus reaches the grid
4. With focus on a cell, note that the contents is repeated twice
5. Navigate to a different column or row by pressing one of the arrow keys
6. Note that the contents in this gridcell is also announced twice

Expected behavior

Contents of a grid cell should only be announced once.

JAWS version

JAWS Version 2026.2510.195

I also tested this with JAWS Version 2025.2508.120, and found that the issue is consistent.

Windows version

Windows 11 Version 10.0.26100 Build 26100

Name and version of other software in use when reproducing the issue

Firefox version: 146.0 (64-bit)