Describe the bug
When using the FastStream Firefox add-on, the video does not load into a clean player window. Instead, the add-on seems to inject its own player inside the site’s existing video player, resulting in a “player within a player” effect. This creates two overlapping player interfaces and makes playback controls confusing or unusable.

Version
1.3.62

Platform
Windows 11 (latest updates but not the september preview) Firefox version 143.0.4 (64-Bit)

Steps to Reproduce

1. Go to https://filmpalast.to/
2. Open any movie
3. Choose the Veev HD player
4. The FastStream player loads inside the existing player window, creating a nested/double player.

Here is a Picture of how the Problem looks