Windows + IE is the STANDARD.

Build for the STANDARD.

If you can not go that?

Go find another job.

I am furious.

This goes on for a week now,

together with that years OLD and MOST end user UN-friendly LARGE HEADER.

There are INTERNATIONAL STANDARDS and CONVENTIONS of what should be in a header or a footer.

Exactly to avoid doubles and tripples. 
With the purpose of making a document standard, and understandable for all.

FOLLOW them.

Poser 1, 2, 3, 4, 5, 7, P8 and PPro2010, P9 and PP2012, P10 and PP2014 Game Dev
"Do not drive faster then your angel can fly"!