[feat]: Support configurable keyboard shortcuts on Firefox

[tzinm]

Prerequisites

• [x] I've searched in the documentation and did not found anything related to the feature I'm about to request.
• [x] I've read the release note and the one I'm about to create is not already developed.

Is your feature request related to a problem?

Currently, keyboard shortcuts are documented and configurable for Chrome-based browsers, but Firefox users don’t have an equivalent.

Describe the solution you'd like

Provide feature parity for Firefox by enabling configurable keyboard shortcuts and adding a short documentation section for Firefox users explaining how to set them up. The goal is that Firefox users can assign shortcuts to the same actions already supported in Chrome

[tprouvot]

Hi @tzinm I'll check if this can be done with the existing implementation