_libly.js
_smooziee.js
_vimperatorrc.js
alert.js
amebanow.js
appendAnchor.js
applauncher.js
asdfghjkl.js
auto-copy.js
auto-focus-frame.js
auto_detect_link.js
auto_reload.js
auto_source.js
autopagerize_controll.js
bitly.js
browser_object.js
bufferecho.js
buftabs.js
caisui-cmaps.js
caret-hint.js
clear_privacy_data.js
clock.js
commandBookmarklet.js
cookie.js
copy.js
echopy.js
every.js
ex_autocmd.js
ex_quickmark.js
extension-manager.js
feedSomeKeys_3.js
feeder.js
garbage_finder.js
gmperator.js
google-translator.js
googledocs.js
gvimail.js
hatenaStar.js
heuristic-search.js
hint-tombloo.js
i_love_echo.js
imageextender.js
ime_controller.js
janus_line.js
jquery-loader.js
jscompletion.js
jscompletion.js
kill-menu-mode.js
ldrize_cooperation.js
literal-bmark.js
lo.js
maine_coon.js
matanico.js
memo.js
migemized_find.js
migemo_completion.js
migemo_hint.js
moreqmarks.js
morse.js
mouse-over-hint.js
multi-exec.js
multi_requester.js
namakubi.js
no-reading.js
option-selector.js
options-migrate-user-pref.js
pino.js
pixiv_tools.js
pluginManager.js
plugin_loader.js
plugin_loader.js
readcatlater.js
reading.js
refcontrol.js
sbmcommentsviewer.js
session-manager.js
statstat.js
stella.js
subscldr.js
tabsort.js
temp.js
template.js
temporary-commandline-options.js
tombloo.js
twitter.js
umihara.js
unicode.js
uuid.js
walk-input.js
x-hint.js
xpathBlink.js
xpath_hint.js
xpcom_inspector.js
yetmappings.js
zip-de-download.js
zoom-em-all.js

Result of
  :echo [File(n).leafName for (n in plugins.contexts)].sort().join('\n')