Where is lpr called in strace of mozilla?

[tashirosgt]

I was trying to find out what mozilla did to print the current page by running it with
strace mozilla >&mylog
It prints the page ok but I don't see what commands in the mylog file do it.
Can anyone find them?

[Jman]

The lpr command is in the printer configuration. File > Print, Properties... button, and there is the lpr command.

[tashirosgt]

But what I want to know is how and where mozilla calls a print command. (Then I can check if what effect that printer configuration really has.)