[Bug]: Onboarding - Console errors `SES Removing unpermitted intrinsics` and `Removing intrinsics.%DatePrototype%.toTemporalInstant` [Firefox]

### Describe the bug

Whenever I land into the MetaMask password screen, I see the UI console error `SES Removing unpermitted intrinsics` and `Removing intrinsics.%DatePrototype%.toTemporalInstant`
This seems a specific issue with Firefox.

### Expected behavior

_No response_

### Screenshots/Recordings

https://github.com/user-attachments/assets/43fe173e-851f-4498-9ad2-3c69fea9fdbe

### Steps to reproduce

1. Import MetaMAsk
2. Start Onboarding
3. Land into the Password screen
4. See error

### Error messages or log output

```shell

```

### Detection stage

During release testing

### Version

13.5.0

### Build type

None

### Browser

Firefox

### Operating system

MacOS

### Hardware wallet

_No response_

### Additional context

_No response_

### Severity

_No response_

Start by reproducing the onboarding flow in Firefox on macOS, following the listed steps until the password screen, and inspect where the two SES console errors originate. The issue does not name files or tests; done means the onboarding screen no longer emits these errors in Firefox without regressing the flow.

Written by the indexing model from the issue text.