Addon "Custom Style Script"

[hikerus]

What happened?

Does the recent Waterfox 6.5.6 (Linux version) not support the add-on "Custom Style Script"? https://mybrowseraddon.com/custom-style-script.html Does not work over here.

Reproducible?

• [x] I have checked that this issue cannot be reproduced on Mozilla Firefox.

Version

G6

What platform are you seeing the problem on?

Linux

Relevant log output