Option to auto-expand posts in timeline

[RealVegOs]

I would like such a feature for desktop use. Of course I understand others who are happy with shortened post, especially on mobile devices. Really great would be a more detailed setting like shorten to n pixels or expand completely, perhaps with a simple slider. So all users would benefit from this improvement.

A 2019 addon with a user style script for auto-expand throws errors and does not work with newer Firefox versions.

Edit: I got this userstyles.org thing to work, but I keep my feature request up. Thanks for your understanding.