+# except sometimes you get a new stable before it's
+# officially released, which is ok by me. for example,
+# right now, it has 6.5.2, but stable is 6.5.1.
+# we exclude verions with letters, as that seems to
+# be a relatively reliable indication of alpha/beta releases.
+
+vers=($(curl -s https://dist.torproject.org/torbrowser/ \
+ | sed -rn 's#.*href="([0-9]+\.[0-9]+[.0-9]*)/.*#\1#p' \
+ | sort -Vr))