A couple of thing that seem ‘odd’?
This morning when I opened Facebook from a desktop icon link a 2nd tab opened, http://www.orlandosentinel.com/weather/hurricane/os-central-florida-weather-tropics-20160604-story.html????
I went to the URL for Tab Mix Plus, enter link description here and the page is blank?
I looked up the developer on the add-ons page, same result as the first link?
I really got suspicious that there is a problem with this add-on as I was on another URL and all of a sudden that URL switched to a FAKE Adobe page and a dialog box popped up for a FLASHPLAYER D/L to be saved. Odd ONLY because Tab Mix is set to open links in a new tab and I had NOT touched a link, I was reading the page.
On top of that, my wife also had the add-on installed and twice she accepted the D/L. Immediately Norton Security quarantined it. She was on other sites when it happened. One was a game on Facebook and she assumed the game needed the d/l update of Flash.
I don’t think many sites would be infected but an add-on could be. Now that I can’t even contact the author or see his site I’m wondering if that add-on is the cause.
BTW, the minute I canceled the d/l the web page went back to my original URL I was on. I couldn’t capture the URL, wasn’t even in my history, but I could see my wifes, 2 different ones as the d/l was accepted.