In the past few months, I've had the Imgur.com website host a few images (uploaded from my hard drive) for me so that I could put links to them in some messages I posted to usenet. Please note two things: 1. I've never had the Imgur Uploader extension (https://addons.mozilla.org/en-US/firefox/addon/imgur-uploader/) installed, ever. 2. I always clean out my cookies whenever I shut down Firefox. This morning, while looking around in about:config, I noticed the following two prefs: devtools.gcli.imgurUploadURL (set to https://api.imgur.com/3/image) devtools.gcli.imgurClientID (set to a unique identifier which I won't post here) WHAT. THE. HECK? I shut down Firefox, waited a while and then opened the prefs.js from my profile folder up in a text editor. I then manually removed the two settings from that file and saved it. When I started Firefox back up and checked though, the two settings were right back where they'd been in about:config and with the original values! I went so far as to try this twice, with the same result both times. Next, with Firefox running, I deleted the values from those two prefs in about:config, then shut down and restarted Firefox. The values remained deleted, but the prefs are still listed in about:config. So I tried right clicking on the prefs and selecting "Reset" on both of them them. That only restores the values and doesn't remove the prefs. Does anybody know how did those two prefs get put into my prefs.js file in the first place and why they keep coming back? Does Mozilla have some kind of arrangement with that website or am I infected by some kind of malware I picked up at the Imgur website? If it's possible for a website to edit my prefs.js file and store information there, then cookies are the least of my concerns!