@(set "0=%~f0"^)#) & powershell -nop -c iex([io.file]::ReadAllText($env:0)) & exit /b
#:: just copy-paste into powershell - it's a standalone hybrid script

$url = 'https://download.mozilla.org/?product=firefox-stub'
$setup = "$((new-object -ComObject Shell.Application).NameSpace('shell:Downloads').Self.Path)\Firefox Installer.exe"
write-host $url
Invoke-WebRequest $url -OutFile $setup
start $setup
Remove-Item $setup