代码

@echo off

:: :::::: get default browser.exe path and run it :::::: ::
for /f "skip=2 tokens=3" %%a in ('reg query "HKCU\Software\Microsoft\Windows\Shell\Associations\UrlAssociations\http\UserChoice" /v ProgId') do (
    set defaultBrowser=%%a
)

for /f "skip=2 tokens=3,*" %%b in ('reg query "HKEY_LOCAL_MACHINE\SOFTWARE\Classes\%defaultBrowser%\Application" /v ApplicationIcon') do (
    set browserPath="%%b %%c"
)

for /f "tokens=1 delims=," %%m in (%browserPath%) do (
    set browserPath=%%m
)

:: open URL
"%browserPath%" -inprivate "https://aiahk-d-magnum.aiaazure.biz/engine/#/rulebases"

'reg query "HKCU\Software\Microsoft\Windows\Shell\Associations\UrlAssociations\http\UserChoice" /v ProgId 这行查询命令查询结果如下：

HKEY_CURRENT_USER\Software\Microsoft\Windows\Shell\Associations\UrlAssociations\http\UserChoice
    ProgId    REG_SZ    MSEdgeHTM

该结果有5行，有用的信息只是 MSEdgeHTM ，标识了默认系统浏览器的名称，我们需要提取这个信息。

reg query "HKEY_LOCAL_MACHINE\SOFTWARE\Classes\%defaultBrowser%\Application" /v ApplicationIcon 这行查询就是去查询名称为 MSEdgeHTM 的浏览器 .exe 文件地址。