1848394 - (a11y_checks_focusable) [meta] Ensure clickable controls are also keyboard accessible

Status: NEW

(Firefox :: Keyboard Navigation, task, P3)

Description

[❌ Anna Yeddi [:ayeddi] ❌ On leave until 2027-01-04]

We should not have any controls that can be activated with a mouse that cannot be activated with a keyboard alone. Usually, those are controls that can be clicked but they are not made focusable, thus a keyboard-only user (usually a user with limited mobility, a user with low vision, a user of assistive technology like a screen reader or an alternative input device like a switch control, or a power user) cannot move the focus to this control and cannot activate it.

The bug 1692110 activates accessibility checks for all mochitests that fire click events to ensure all clickable controls are also accessible with a keyboard. This metabug is to be blocked by bugs filed for individual inaccessible components in our code base.

Note: per Accessibility Triage guidance, lack of keyboard support is expected to receive the Accessibility severity S2 flag, because the inability to focus a control is blocking access to this control for a user.