configure zoom in/out for firefox

Hello Muse1959,

Welcome to Apple Support Communities.

From reading your post, it appear you would like to zoom in and out on Firefox, correct? We're here to help you take a look in to that!

Here are a couple articles to follow on steps to help resolve this issue:

How to zoom in or out on Mac

Font size and zoom - increase the size of web pages - Firefox Support

If the issue persist, we would encourage reaching out the Firefox Support for further assistance.

Hopefully this helps!

Hi Muse1959,

Sounds like you have troubleshot through this article, great work! Have you tested Firefox with a new user account? Let's create a new user account and test:

How to test an issue in another user account on your Mac

Have a great day!