2 ms·Settings -> Appearance. There will be a section to choose a folder with your custom css files.by grishka 5y agoSettings -> Appearance. There will be a section to choose a folder with your custom css files.timothevs 5y agoI may be obtuse, but I am not seeing that on Vivaldi 4.0 on the Mac?grishka 5y agohttps://i.imgur.com/21ueqSf.png https://i.imgur.com/21ueqSf.png in the lower part of the window (I'm too lazy to switch the language sorry). You need to restart it for the checkbox to take effect.