Bug: Lexical still focused after clicking outside in Firefox

Lexical version: v0.34.0

## Steps To Reproduce

1. Go to Lexical Playground in Firefox (142.0.1)
2. Clear Editor
3. Paste following content
**foo**
bar
4. Move Cursor to start of content and click
5. Move Mouse over second content row
6. Move Mouse to right until cursor is outside of the editor
7. Click

## The current behavior
Lexical is still focused

## The expected behavior
Lexical loose focus by clicking outside

Reproduce the issue in the Lexical Playground using Firefox 142.0.1 and the listed steps, then trace the editor focus behavior when clicking beyond the content boundary. Done means clicking outside the editor reliably removes focus without regressing the described editing flow.

Written by the indexing model from the issue text.