Supporting Mac OS X has turned out to be too difficult. I was able to fix the scrollbar issue but it’s a clumsy solution I’d rather not have to deal with. And even then, a host of other issues remain. So I will just consider it unsupported. If anyone wants to create Mac OS X versions of my themes, let me know.
I’ve marked the themes as for Windows on Firefox Add-ons. I’m not sure it’s necessary to mark other systems such as Linux unsupported, but they only allow the choice of a single platform or all. There appears to be many problems on Linux anyway, so it might be best. You can always download and install it manually.
I’ll introduce some of the changes. Obviously, the unified back and forward buttons have been adapted from the default theme, something that took a lot of effort to do well. The border radius, arrow shapes and obviously, color and gradients are some of the aspects that have been through countless iterations to find the right appearance. There are also hand-tuned active and disabled state images and, a notable usability advantage over the default, a subtle drop-down hover indication.
The Home and Downloads icons are now seen from the front, for better visual balance and consistency. The New Window and New Tab icons now lack the plus signs, which seemed kind of superfluous, although I’m not quite sure about this yet.
Arvid Axelsson 