/usr/share/xul-ext/greasemonkey/modules/util/ is in xul-ext-greasemonkey 1.15-1~deb7u1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/xul-ext/greasemonkey/modules/util/alert.js
/usr/share/xul-ext/greasemonkey/modules/util/anonWrap.js
/usr/share/xul-ext/greasemonkey/modules/util/apiLeakCheck.js
/usr/share/xul-ext/greasemonkey/modules/util/checkCoralCache.js
/usr/share/xul-ext/greasemonkey/modules/util/compareFirefoxVersion.js
/usr/share/xul-ext/greasemonkey/modules/util/emptyEl.js
/usr/share/xul-ext/greasemonkey/modules/util/enqueueRemoveFile.js
/usr/share/xul-ext/greasemonkey/modules/util/getBinaryContents.js
/usr/share/xul-ext/greasemonkey/modules/util/getBrowserWindow.js
/usr/share/xul-ext/greasemonkey/modules/util/getContents.js
/usr/share/xul-ext/greasemonkey/modules/util/getEditor.js
/usr/share/xul-ext/greasemonkey/modules/util/getEnabled.js
/usr/share/xul-ext/greasemonkey/modules/util/getScriptSource.js
/usr/share/xul-ext/greasemonkey/modules/util/getService.js
/usr/share/xul-ext/greasemonkey/modules/util/getTempDir.js
/usr/share/xul-ext/greasemonkey/modules/util/getTempFile.js
/usr/share/xul-ext/greasemonkey/modules/util/getUriFromFile.js
/usr/share/xul-ext/greasemonkey/modules/util/hitch.js
/usr/share/xul-ext/greasemonkey/modules/util/inArray.js
/usr/share/xul-ext/greasemonkey/modules/util/installScriptFromSource.js
/usr/share/xul-ext/greasemonkey/modules/util/isGreasemonkeyable.js
/usr/share/xul-ext/greasemonkey/modules/util/logError.js
/usr/share/xul-ext/greasemonkey/modules/util/memoize.js
/usr/share/xul-ext/greasemonkey/modules/util/newUserScript.js
/usr/share/xul-ext/greasemonkey/modules/util/openInEditor.js
/usr/share/xul-ext/greasemonkey/modules/util/scriptDir.js
/usr/share/xul-ext/greasemonkey/modules/util/scriptMatchesUrlAndRuns.js
/usr/share/xul-ext/greasemonkey/modules/util/setEditor.js
/usr/share/xul-ext/greasemonkey/modules/util/setEnabled.js
/usr/share/xul-ext/greasemonkey/modules/util/sha1.js
/usr/share/xul-ext/greasemonkey/modules/util/showInstallDialog.js
/usr/share/xul-ext/greasemonkey/modules/util/sniffGrants.js
/usr/share/xul-ext/greasemonkey/modules/util/timeout.js
/usr/share/xul-ext/greasemonkey/modules/util/uriFromUrl.js
/usr/share/xul-ext/greasemonkey/modules/util/uuid.js
/usr/share/xul-ext/greasemonkey/modules/util/windowId.js
/usr/share/xul-ext/greasemonkey/modules/util/windowIdForEvent.js
/usr/share/xul-ext/greasemonkey/modules/util/windowIsClosed.js
/usr/share/xul-ext/greasemonkey/modules/util/writeToFile.js