The image background on a theme I made in Firefox Colour isn't working
I made a theme on Firefox Colour and the image that I put under the 'custom backgrounds' tab isn't appearing as the background. Instead it uses the Background Colour from the Custom Colours menu. How would I fix it, so that the image is displayed behind the tabs? (My settings are in the images below.)
Opaite Mbohovái (1)
I am not familiar with the extension. Have you looked at the "official documentation"?
https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/manifest.json/theme#colors