Nice job! One of my favorite things about Vivaldi is the theme, so it's nice to have the same effect in Firefox. It works better than expected. I love that you can choose a day/night theme and customize the start/stop times -- perfect for a night owl like me who is up all night and doesn't have a regular sleep schedule. It's nice to be able to customize the themes further but for me, they're perfect as is. I love that the colors of the tab and menu bar can change based on the favicon. Thanks for your hard work!