Configure chrome://flags (enabled_labs_experiments) through users' Local State file

Configure-ChromeFlags.ps1

# Source: https://gist.github.com/vdepagter/c3a66526467c381bc0b416ca879183c8
# Requires all Chrome processes to be stopped (check persistent task bar).
# Modify $SetProperties as desired. These flags will be added or modified. Existing flags are preserved.
If (Test-Path "I:\Chrome") {
    Start-Transcript "I:\Chrome\Set-ChromePrefs.log"
    [array]$SetProperties = 'enable-native-notifications@2','enable-system-notifications@2'
    try {
        If (Test-Path "HKCU:\Software\Policies\Google\Chrome") { $LocalStateFile = (Get-ItemProperty "HKCU:\Software\Policies\Google\Chrome").UserDataDir + '\Local State' }
        If (-not $LocalStateFile) { $LocalStateFile = "$($env:localappdata)\Google\Chrome\User Data\Local State" }
        #notepad $LocalStateFile
        If (Test-Path $LocalStateFile) {
            $LocalState = (Get-Content -LiteralPath $LocalStateFile) -Replace [regex]::escape('"":'),'"_emptyName":' # ConvertFrom-Json issue: https://github.com/PowerShell/PowerShell/issues/1755
            $JsonContent = ConvertFrom-Json -InputObject $LocalState
            $JsonContent.browser | fl enabled_labs_experiments
            # If browser property does not exist, add it
            If (-not $JsonContent.browser) { $JsonContent | Add-Member -Type NoteProperty -Name 'browser' -Value $null }
            # If browser.enabled_labs_experiments property does not exist, add it
            If (-not (($JsonContent.browser | gm) |?{$_.Name -eq 'enabled_labs_experiments'})) { $JsonContent.browser | Add-Member -Type NoteProperty -Name 'enabled_labs_experiments' -Value ([array]$SetProperties) }
            foreach ($property in $SetProperties) {
                # If browser.enabled_labs_experiments already contains the flag, remove it first
                If ($JsonContent.browser.enabled_labs_experiments -match ($property -Replace '@.*')) {
                    Write-Host -b black -f yellow "Removing already existing flag $($property -Replace '@.*')"
                    [array]$JsonContent.browser.enabled_labs_experiments = $JsonContent.browser.enabled_labs_experiments | ?{$_ -notmatch ($property -Replace '@.*')}
                }
                # Add flag
                Write-Host -b black -f green "Adding flag $property"
                $JsonContent.browser.enabled_labs_experiments += [array]$property
            }
            $JsonContent.browser | fl enabled_labs_experiments
            $NewLocalState = (ConvertTo-Json -Depth 32 -InputObject $JsonContent -Compress) -Replace [regex]::escape('"_emptyName":'),'"":'
        } Else {
            md -EA Si (($LocalStateFile -Split '\\' | Select -SkipLast 1) -Join '\') # Create directory if necessary
            $NewLocalState = '{"browser":{"enabled_labs_experiments":["enable-system-notifications@2","enable-native-notifications@2"]}}'
        }
        Set-Content -Value $NewLocalState -LiteralPath $LocalStateFile
    } catch { Write-Host -b black -f red "Error occurred: $($Error[0])"}
    Stop-Transcript
} Else {
    Write-Host -b black -f red "ERROR: `"I:\Chrome`" directory not found"
}