On the Arch Forums[1] I finally found a nice way to "disable" the use
of "recently-used.xbel". See[2]. In the past, I simply deleted that
file on a regular basis.
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1.
https://bbs.archlinux.org/viewtopic.php?id=137697
2.
http://ubuntu-snippets.blogspot.com/2009/02/recently-usedxbel-xml-horror.html