sample-json.ps1

try {
    Add-Type -AssemblyName System.Web.Extensions
    $javaScriptSerializer = New-Object System.Web.Script.Serialization.JavaScriptSerializer
    $javaScriptSerializer.MaxJsonLength = [System.Int32]::MaxValue
    $javaScriptSerializer.RecursionLimit = 99
    (
        (
            $javaScriptSerializer.DeserializeObject(
                (Get-Content -Encoding UTF8 -Raw -Path "$($env:APPDATA)\Mozilla\Firefox\Profiles\*\sessionstore-backups\recovery.js" -ErrorAction Stop).Trim('()') 
            )['windows']
        ) | Select -First 1
    )['tabs'] | 
    Where { -not($_.hidden) } |
    ForEach-Object {
        $e = @($_.entries)[-1]
        [pscustomobject]@{
            url = ($e)['url']
            title= ($e)['title']
        }
    } 
} catch {
    Write-Warning -Message "Failed because $($_.Exception.Message)"
}