browser

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]).