[Firefox] Profile conditions tab glitching

**Description**
On a fresh install of Yomitan on Firefox. Go to `Settings` > `Configure Profiles` and click `Add`. Then the page starts glitching

https://github.com/user-attachments/assets/a779a23c-d672-4a57-ab2a-29880abe907c

Unreproducible on Chrome and Edge. Seems to be a Firefox-specific bug.

**Browser version**
Firefox 145.0.2 (64-bit)

