Convert Firefox bookmarks file (JSON format) to plain text

FirefoxBookmarksConverter.ps1

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' Convert Firefox bookmarks file (JSON format) to plain text (v.20211212)                          '
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set-executionpolicy unrestricted -scope currentuser
$erroractionpreference = "silentlycontinue"; remove-variable *; $erroractionpreference = "continue"

$inputFile = "bookmarks.json"
$outputFile = "bookmarks.txt"
$separator = "`t"

$baseDate = Get-Date "1/1/1970"
$obj = Get-Content $inputFile -Encoding UTF8 | ConvertFrom-Json

while ($obj -ne $null)
{
    foreach ($node in $obj)
    {
        if ($node.uri -ne $null)
        {
            try { $dateAdded = $baseDate.AddMilliseconds([Int64]($node.dateAdded/1000)).ToString("yyyyMMdd-HHmmss") }
            catch { $dateAdded = $baseDate.ToString("yyyyMMdd-HHmmss") }

            try { $lastModified = $baseDate.AddMilliseconds([Int64]($node.lastModified/1000)).ToString("yyyyMMdd-HHmmss") }
            catch { $lastModified = $baseDate.ToString("yyyyMMdd-HHmmss") }

            $content += $dateAdded + $separator + $lastModified + $separator + $node.uri + $separator + $node.title + "`n"
        }
    }

    $obj = $obj.children
}

$content | Out-File $outputFile
" Ready! "
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