[OSX] The returned PID is not the good one

[gabrielstuff]

While running the launcher :

• the returned instance give a PID which is always one digit under the good one. Thus result in the impossibility to control this instance.

[gabrielstuff]

This might also apply on Linux

[alessioalex]

I've tested with Chrome and Firefox on Ubuntu just now and it works. @gabrielstuff does this bug apply to all browsers? can you provide more details please? tnx