Respect string-valued "browser" field of package.json files.
Respect string-valued "browser" field of package.json files.

Fixes #6207.

lorensr/meteor,4commerce-technologies-AG/meteor,4commerce-technologies-AG/meteor,Hansoft/meteor,AnthonyAstige/meteor,4commerce-technologies-AG/meteor,lorensr/meteor,nuvipannu/meteor,mjmasn/meteor,4commerce-technologies-AG/meteor,DAB0mB/meteor,mjmasn/meteor,chasertech/meteor,chasertech/meteor,jdivy/meteor,4commerce-technologies-AG/meteor,nuvipannu/meteor,chasertech/meteor,chasertech/meteor,Hansoft/meteor,AnthonyAstige/meteor,AnthonyAstige/meteor,mjmasn/meteor,jdivy/meteor,DAB0mB/meteor,DAB0mB/meteor,mjmasn/meteor,DAB0mB/meteor,AnthonyAstige/meteor,DAB0mB/meteor,Hansoft/meteor,mjmasn/meteor,AnthonyAstige/meteor,chasertech/meteor,lorensr/meteor,Hansoft/meteor,Hansoft/meteor,AnthonyAstige/meteor,nuvipannu/meteor,AnthonyAstige/meteor,DAB0mB/meteor,lorensr/meteor,DAB0mB/meteor,4commerce-technologies-AG/meteor,mjmasn/meteor,jdivy/meteor,nuvipannu/meteor,Hansoft/meteor,mjmasn/meteor,lorensr/meteor,lorensr/meteor,AnthonyAstige/meteor,chasertech/meteor,jdivy/meteor,lorensr/meteor,Hansoft/meteor,chasertech/meteor,nuvipannu/meteor,jdivy/meteor,4commerce-technologies-AG/meteor,jdivy/meteor,jdivy/meteor,nuvipannu/meteor,nuvipannu/meteor