Thanks for this great template.
However I'm facing some difficulties:

Firefox:
-background doesn't show

IE9:
-Widgets in siedebar a don't show
-background doesn't show

Everything works fine with Chrome.

URL: lehmann-gt.ch/

Any suggestions?

Hello,
Firefox:
I cant see any issue with FF ( see screenshot attached), and which background do you mean? Which FF version?

IE9
The ie9 is not supported, see Template description ( IE10+). But you can try to disable the "module animations".
>>Template Parameter > Module > Animation

It's actually about the background of the Logo (Header section).
See attachment

It's a high res. picture in the background to match big screens. Is there a limit or recommendation?

I tried with FF v. 35 and 36.
I also cleared history & cache.
The background still doesn't show with Firefox

Thanks for the information about IE. Disabling the animations worked out perfect.

EDIT: Tried again with FireFox. Now it's ok. Might have been a problem witch cache/cookies.

Problem solved

Problem solved.