Have some embedded devices with older versions of firefox (<= 26) where the widget shows up nicely, but the background, no matter what theme you choose, remains pure black. Setting option transparent, with or without a theme specified results in same unchangeable blackness… Updating to the latest version of FF is not trivial on these embedded ARM devices with customized linux.
Assuming there’s some CSS that the widgets use that the older version of FF doesn’t support, is there a way to override the CSS so that we can force the background of that widget/generated iframe to be transparent?
I’ve searched these forums, and Google, but no one is reporting this behavior.