Enhance scrollbar look and feel on Firefox

[st3phhays]

Checklist

• I have verified this is the correct repository for opening this issue.
• I have verified no other issues exist related to my request.

Is Your Feature Request Related To A Problem? Please describe.

Choco-theme does not customize scrollbars on Firefox, but does on chromium based browsers.

Describe The Solution. Why is it needed?

We should look to see if we can customize the scrollbars at least a little bit. They are not as customizable as Chromium based browsers, but we may be able to make them look a little bit better. See https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_scrollbars_styling

Additional Context

No response

Related Issues

No response