Firefox.ps1

# Silent Install Firefox by theSens 
$currentPrincipal = New-Object Security.Principal.WindowsPrincipal( 
[Security.Principal.WindowsIdentity]::GetCurrent() )
& {
if ($currentPrincipal.IsInRole( [Security.Principal.WindowsBuiltInRole]::Administrator ))
{
    Write-Host "Starting silent firefox installer!" -ForegroundColor Green
    $done = $FALSE

    # Path for the workdir
    $workdir = "c:\firefox-install\"

    # Check if work directory exists if not create it
    if (Test-Path -Path $workdir -PathType Container)
    {
        Write-Host "$workdir already exists." -ForegroundColor Yellow
    }
    else
    {
        New-Item -Path $workdir -ItemType directory | Out-Null
    }

    # Find out architecture and donwload corresponding version
    if((Get-WmiObject Win32_OperatingSystem).OSArchitecture -ne $null)
    {
        if((Get-WmiObject Win32_OperatingSystem).OSArchitecture.ToString() -eq "64-bit")
        {
            $source = "https://download.mozilla.org/?product=firefox-latest&os=win64&lang=en-US"
            Write-Host "64-Bit OS found from WMIObject: Installing Firefox x64"
        }
        else
        {
            $source = "https://download.mozilla.org/?product=firefox-latest&os=win&lang=en-US"
            Write-Host "32-Bit OS found from WMIObject: Installing Firefox x86"
        }
    }
    elseif($ENV:PROCESSOR_ARCHITECTURE -eq "AMD64")
    {
        $source = "https://download.mozilla.org/?product=firefox-latest&os=win64&lang=en-US"
        Write-Host "64-Bit OS found from Powershell process: Installing Firefox x64"
    }
    else
    {
        $source = "https://download.mozilla.org/?product=firefox-latest&os=win&lang=en-US"
        Write-Host "32-Bit OS found from Powershell process: Installing Firefox x86"
    }

    # Download
    Write-Host "Downloading..."
    $downloader = New-Object System.Net.WebClient
    $downloader.DownloadFile($source, "$workdir\firefox.exe")


    # Start the installation
    Start-Process -FilePath "$workdir\firefox.exe" -ArgumentList "/S"

    # Wait for the installation to finish
    Write-Host "Installing..."
    while(-not $done)
    {          
        Start-Sleep -Seconds 5
        if(-Not (Get-Process *firefox*))
        {$done = $TRUE}
    }


    # Remove the work files and dir
    if($done)
    {
        Write-Host "Installed!" -ForegroundColor Green
        Remove-Item $workdir -Force -Recurse
    }
    if(-Not (Test-Path -Path $workdir -PathType Container) 2> $null)
    { 
        Write-Host "Working files and directory removed!" -ForegroundColor Green 
    }
    else
    {
        Write-Host "Working files and directory NOT removed!" -ForegroundColor Red 
    }
    Remove-Variable workdir
    Remove-Variable source
    Remove-Variable downloader
    Remove-Variable done
}
else
{
    Write-Host "Please run the silent Firefox installer from an Adminsitrator PowerShell" -ForegroundColor Red
}
}