git/Documentation/config/browser.txt

browser.<tool>.cmd::
	Specify the command to invoke the specified browser. The
	specified command is evaluated in shell with the URLs passed
	as arguments. (See linkgit:git-web{litdd}browse[1].)

browser.<tool>.path::
	Override the path for the given tool that may be used to
	browse HTML help (see `-w` option in linkgit:git-help[1]) or a
	working repository in gitweb (see linkgit:git-instaweb[1]).