[osx] Fix install for Firefox Nightly
[osx] Fix install for Firefox Nightly

zlot/dotfiles,wingy3181/dotfiles,b-boogaard/dotfiles,christophermoura/dotfiles,mickael83/ubuntu-dotfiles,zlot/dotfiles,AlbertoElias/dotfiles,newtonne/dotfiles,christophermoura/dotfiles,makabde/dotfiles,wingy3181/dotfiles,pbrooks/dotfiles,EDiLD/dotfiles,oddlord/dotfiles,EDiLD/dotfiles,girishramnani/dotfiles,makabde/dotfiles,wingy3181/dotfiles,newtonne/dotfiles,girishramnani/dotfiles,AlbertoElias/dotfiles,mickael83/ubuntu-dotfiles