[Replay] Capacitor replay not showing correctly when windowed on Firefox

### Environment

SaaS (https://sentry.io/)

### Steps to Reproduce

Link: https://sentry-sdks.sentry.io/explore/replays/460d6e5a91c14da09518d380be9c34da/?referrer=%2Fexplore%2Fdiscover%2Fhomepage%2F

Browser: Firefox 139.0.1 (64-bit) for arch linux
```
gfx.monitors.[0].screenWidth 3414
gfx.monitors.[0].screenHeight 2134
gfx.monitors.[0].defaultCSSScaleFactor 2
gfx.monitors.[0].contentsScaleFactor 2
gfx.monitors.[1].screenWidth 3658
gfx.monitors.[1].screenHeight 2058
gfx.monitors.[1].defaultCSSScaleFactor 2
gfx.monitors.[1].contentsScaleFactor 2

```

Monitor resolution is 2560x1600 with 150% scale

### Expected Result

I can see the entire app without checking it full-screen like on Edge.

### Actual Result

### Product Area

Replays

### Link

https://sentry-sdks.sentry.io/explore/replays/460d6e5a91c14da09518d380be9c34da/?referrer=%2Fexplore%2Fdiscover%2Fhomepage%2F

### DSN

_No response_

### Version

_No response_

Start by reproducing the replay linked in the issue on Firefox 139.0.1 with the reported windowed, scaled multi-monitor setup, and compare it with Edge. Done means the entire replay app is visible in a non-full-screen window without the reported sizing or clipping problem.

Written by the indexing model from the issue text.