Windows 10 deployment script that runs once for each newly created user account.

StartupOnce.bat

echo Y|del %appdata%\microsoft\windows\recent\automaticdestinations\*
rem Start Firefox
"C:\Program Files\Mozilla Firefox\firefox.exe"
rem Uninstall Photos
powershell -command "Get-AppxPackage Microsoft.Windows.Photos | Remove-AppxPackage"
rem Set region to Romania, regional format to Romania, add Romanian keyboard
powershell -command Set-Culture -CultureInfo ro-RO
powershell -command Set-WinHomeLocation -GeoId 0xc8
powershell -command "$langs = Get-WinUserLanguageList; $langs.Add(\"ro-RO\"); Set-WinUserLanguageList $langs -Force"
powershell -command "Set-TimeZone -Id \"GTB Standard Time\" -PassThru"
rem Install appx packages: HEVC codec, Ubuntu (wsl), Pride theme
powershell -command Add-AppxPackage C:\Tools\packages\Microsoft.Pride2020Flags_3.0.0.0_neutral__8wekyb3d8bbwe.Appx
powershell -command Add-AppxPackage C:\Tools\packages\CanonicalGroupLimited.UbuntuonWindows_2004.2020.418.0_neutral_~_79rhkp1fndgsc.AppxBundle
powershell -command Add-AppxPackage C:\Tools\packages\Microsoft.HEVCVideoExtension_1.0.33242.0_x64__8wekyb3d8bbwe.Appx
rem Kill Firefox
taskkill /f /im firefox.exe
rem Configure Firefox addons
powershell -command "Copy-Item \"C:\Tools\firefox\{9b8ce341-744f-4f5d-9ff7-b5d7078a7b34}.xpi\" -Destination \"$([environment]::getfolderpath(\"ApplicationData\"))\Mozilla\Firefox\Profiles\dcfvpxs9.default-release\extensions\""
powershell -command "Copy-Item \"C:\Tools\firefox\{287dcf75-bec6-4eec-b4f6-71948a2eea29}.xpi\" -Destination \"$([environment]::getfolderpath(\"ApplicationData\"))\Mozilla\Firefox\Profiles\dcfvpxs9.default-release\extensions\""
powershell -command "Copy-Item \"C:\Tools\firefox\{a6c4a591-f1b2-4f03-b3ff-767e5bedf4e7}.xpi\" -Destination \"$([environment]::getfolderpath(\"ApplicationData\"))\Mozilla\Firefox\Profiles\dcfvpxs9.default-release\extensions\""
powershell -command "Copy-Item \"C:\Tools\firefox\clearcache@michel.de.almeida.xpi\" -Destination \"$([environment]::getfolderpath(\"ApplicationData\"))\Mozilla\Firefox\Profiles\dcfvpxs9.default-release\extensions\""
powershell -command "Copy-Item \"C:\Tools\firefox\extension@tabliss.io.xpi\" -Destination \"$([environment]::getfolderpath(\"ApplicationData\"))\Mozilla\Firefox\Profiles\dcfvpxs9.default-release\extensions\""
powershell -command "Copy-Item \"C:\Tools\firefox\foxyproxy@eric.h.jung.xpi\" -Destination \"$([environment]::getfolderpath(\"ApplicationData\"))\Mozilla\Firefox\Profiles\dcfvpxs9.default-release\extensions\""
powershell -command "Copy-Item \"C:\Tools\firefox\mozilla_cc3@internetdownloadmanager.com.xpi\" -Destination \"$([environment]::getfolderpath(\"ApplicationData\"))\Mozilla\Firefox\Profiles\dcfvpxs9.default-release\extensions\""
powershell -command "Copy-Item \"C:\Tools\firefox\uBlock0@raymondhill.net.xpi\" -Destination \"$([environment]::getfolderpath(\"ApplicationData\"))\Mozilla\Firefox\Profiles\dcfvpxs9.default-release\extensions\""
rem Configure Thunderbird
C:\Tools\thunderbird_toasts\thunderbird_toasts.exe
rem Add Thunderbird to startup
powershell -command "Copy-Item \"C:\Tools\Mozilla Thunderbird.lnk\" -Destination $([environment]::getfolderpath(\"Startup\"))"
rem Open Default apps settings page
powershell -command Start-Process "ms-settings:defaultapps"
rem Install Qt VS extension
C:\Tools\qt-vsaddin-msvc2019-2.6.0-rev.07.vsix
del %0