browser: make generic and remove redundant scripts

bin/browser.sh

@@ -1,6 +1,6 @@
 #!/bin/sh
 # browser
-# Written in 2019 by Lucas
+# Written in 2019-2020 by Lucas
 # CC0 1.0 Universal/Public domain - No rights reserved
 #
 # To the extent possible under law, the author(s) have dedicated all
@@ -10,6 +10,18 @@
 # Dedication along with this software. If not, see
 # <http://creativecommons.org/publicdomain/zero/1.0/>.
 
-scp ~/.Xauthority _browser@localhost:
-ssh -n _browser@localhost -- \
-    env DISPLAY=${DISPLAY:-:0} /usr/local/bin/firefox "$@"
+case ${0##*/} in
+tor-browser)
+	user=_tor_browser
+	browser=/usr/local/bin/tor-browser
+	;;
+*)
+	user=_browser
+	browser=/usr/local/bin/firefox
+	;;
+esac
+
+dpy=${DISPLAY:-:0}
+xauth extract - "$dpy" |
+    ssh -l "$user" localhost -- \
+    xauth merge - '&&' env DISPLAY="$dpy" "$browser" "$@"