Very beautiful looking theme. I love dark themes with neon or bright colours and bright, colourful texts and symbols that offer a good contrast so they are easy to read / recognize as a contrast to the background image of the screen. At least on small screens. It looks very good on small/low resolution laptop internal displays like 1600x900 or smaller. I would love if it would also look good on higher resolution screens than that. On bigger displays (like 2560x1440 or bigger) there's a big black fringe on the left side. Not dramatic but it would look better if the image would full out the whole space. Vesperexa do you think it is possible for you to make an update to some of your themes for high resolution screen usage!? I made an theme collection to share themes I personally like with others. I would love to add some of your themes to it, without having to add a disclaimer that they only work as intended on small screens.

Here is a link to my Themecollection:
https://addons.mozilla.org/de/firefox/collections/13329745/Xenofox-Themecollection/