this might be a weird question.....

[brightsmiles]

How do I upload pictures on 4.7?

[Rolig Loon]

You mean Firestorm version 4.7?    Build >>> Upload >>> Image (L$10).  That's the way the standard LL viewer has always done it, and Firestorm moved it from the Avatar menu earlier this year.  It's a little less confusing for people who use both viewers.