Variable: shr-external-browser
shr-external-browser is an alias and customizable for
browse-url-secondary-browser-function, defined in shr.el.gz.
This variable is obsolete since 27.1; use
browse-url-secondary-browser-function instead.
Value
browse-url-default-browser
Documentation
Function used to launch an alternative browser.
This browser is used as the secondary browser choice, typically
when a prefix argument is given to a URL-opening command in those
modes that support this (for instance browse-url-at-point,
goto-addr-at-point, eww or shr).
This assumption is that browse-url-secondary-browser-function
and browse-url-browser-function are set to distinct browsers.
Either one of the two functions should call an external browser
and the other one should not do the same.
Also see browse-url-browser-function.
Probably introduced at or before Emacs version 27.1.
Aliases
shr-external-browser (obsolete since 27.1)