setSystemInfo() method adding same key multiple times in html report.

[SuraiyaMulani]

i am using 3.1.3 community version - setSystemInfo() method adding same key multiple times in html report.
addSystemInfo() method in earlier 2.x versions was overriding values for same key .
I need to add browser details but my browser gets launched in before method so for each method its adding same details again and again.

Can someone give me solution for same.