Fun and with lots of options, but you are then forced to use a light theme everywhere.

Cool way to customize the tabs/top bar colors, but disregards previously existing theme you may have. This makes sense, but it removed the dark theme from the about:newtab page. Plus, a new instance loads with the last theme in use before flashing over to your custom theme. In all, cool idea, but needs work.

I use the Firefox Dark Theme and I really like it, but i wanted change on thing. But this is not possible with this Add-on

Tem 1 problema esse app ele é só compatível com computador da linux ou mac corrija este erro quero ter de usar ele mas não dá

Worked really well for a long time, but now the tab bar will only be white, and it really ruins the entire dark theme I have going on...

Trying to upload the themes created results in error messages: "This theme LWT alias is deprecated.

Warning: See https://mzl.la/2T11Lkc (MDN Docs) for more information."

A bit silly for it to have conflicts with the features it was intended for.

The add-on offers very comprehensive customization, as far as controlling colours of things goes. However, throughout my usage I've noticed two flaws:
1. The default about:newtab page colour is forced to a white background with any theme. If the add-on is going to change it, then that should be part of the customization.
2. Clicking the add-on icon will automatically turn on a theme. The add-on shouldn't do this, instead doing nothing until a user saves the theme.

It's good for changing the color easily, if you don't want to use theme. But I prefer themes (not only because themes have images). I'm afraid this experiment will replace themes in the future. When you vote for this extension, be aware Firefox already has this idea in mind.