permission to distribuite my modified firefox portable

I want to distribute a modified version of firefoxportable (portableapps.co=
m) that show a local webpage in any computer where it's installed.

The changes that I make were: change name of firefox.exe, change descriptio=
n ( "memorias en firefox"), adding usercontent.css and userchorme.css,chang=
ing name of folder firefox changing logo userwindow.ico, adding addons  to =
hide menubars and toolbars, and edit the launcher with "NSIS Portable" to s=
how another splash screen.

The final versi=F3n has a launcher that was made on phyton and start firefo=
xportable.exe.

Finally i pretend to compile it in a installer using inno setup.

I understand that I need your permission to distribute my modified version =
of portable apps, how can I get it? And what I need to do it?

Kind Regards

Ad=E1n Nu=F1ez