Odd "t_files" folder on desktop

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As the flair indicates I'm using Firefox 46.0.1 on OS X 10.11.5. Sometime today an odd folder appeared on my desktop simply titled "t_files". Inside it are four different files titled aboutHome.css, aboutHome.js, contentSearchUI.css, and contentSearchUI.js. Each of these files have Mozilla information in the comments at the top. I have no idea where this folder could have come from, all I've had open today were reddit and some Wikipedia pages, and I'd been away from my computer for a few hours before getting back and seeing it there. Anyone know what could have created it or what it is?

In case these are relevant, my add-ons:

uBlock Origin
uMatrix
RES
NoScript
TabTree
SnoozeTabs
Better Reader
Bamboo RSS Reader
Shortly URL Shortener

(I've used these all for a long time and have never had any issues).

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:firefox: | macOS 12.3

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Posted: 8 years ago
Reddit URL: View post on reddit.com
External URL: reddit.com/r/firefox/com...