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This variable is obsolete since 27.1; use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 is usually an external browser (that is, not eww or w3m), 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, eww/shr).
Also see browse-url-browser-function.
Probably introduced at or before Emacs version 27.1.
Aliases
shr-external-browser (obsolete since 27.1)