Before recently, when I would click on a for sale appliance on Craigslist my browser (or ??) remembered that I had clicked on that link. If I used the back key to go back to the main page the link I had just clicked would be highlighted. Even if I turned my pc off and came back tomorrow to the same for sale appliances and came back to today's listings, the very ones I looked at the day before would be highlighted.
What setting allows this feature?
Trend Micro Titanium
Not sure at all but the time when Trend Micro was installed is vaguely about the time the "remembered" links ended, give or take a few days.