in 2023, with Chrome
version Version 110.0.5481.97 (Build officiel) (64 bits), starting Chrome
using START
Dos command doesn't work anymore !
The solution that works on my Windows 11 PC
set chrome="C:\Program Files (x86)\Google\Chrome\Application\chrome.exe"
start "test" %chrome% --new-window "www.google.com"
or
%chrome% --new-window "www.google.com"
If using START
Dos command, first parameter just after start string is imperative !
If I run following commands,
set chrome="C:\Program Files (x86)\Google\Chrome\Application\chrome.exe"
start %chrome% --new-window "www.google.com"
Windows return an error message that indicate that it doesn't find "--new-window" !

I use START
command to load multiples LOCAL
files in Chrome
using following BAT
script
set chrome="C:\Program Files (x86)\Google\Chrome\Application\chrome.exe"
set dirname=%cd%
set url=
set url=%url% "file:///%dirname%\TABLES.CUMUL.SOLAIRE.html"
set url=%url% "file:///%dirname%\CHARTS.CUMUL.SOLAIRE.html"
set url=%url% "file:///%dirname%\TABLES.CUMUL.JOUR_NUIT.html"
set url=%url% "file:///%dirname%\CHARTS.CUMUL.JOUR_NUIT.html"
set url=%url% "file:///%dirname%\TABLES.CUMUL.JOUR_NUIT_SOLAIRE.html"
set url=%url% "file:///%dirname%\CHARTS.CUMUL.JOUR_NUIT_SOLAIRE.html"
set url=%url% "file:///%dirname%\TABLES.CUMUL.EXCLUSIF.html"
set url=%url% "file:///%dirname%\CHARTS.CUMUL.EXCLUSIF.html"
start "kWh" %chrome% --new-window %url%