Firefox v69.0 Whenever I click on one of the matches returned from a search, or click on an embedded link, Firefox forever highlights that selection even though I don't want to be reminded months later that I had looked at that site. This is irksome because I can't ever get a clean slate for doing searches. Every similar search will yield a page full of highlighted links I may have used in the past on a topic that is only tangentially related. Also, since this highlighting persists independently of clearing history it entails a severe privacy leak. If anybody who is authorized to use my machine suspects that I may have an interest in, say, pizza dough, they need only do a search for pizza dough on my machine and any link I had ever selected in the past is highlighted, from which links it can be easily determined that I have both an interest in the topic at large and what aspect of the topic in particular appeals to me.

How do I disable this "feature", please?