FocusRail — Reading Ruler Support

FocusRail support

For purchase, activation, accessibility, or compatibility help, include the FocusRail version and browser version, but never send a complete license key in a support message.

Chrome does not allow extensions to run on protected pages such as chrome:// URLs or the Chrome Web Store.

Sandboxed or permission-restricted frames may not permit the reading overlay.

Custom in-page shortcuts are intentionally ignored while typing in editable controls.