I've recently done a little experiment and took a look at the first few websites which I have ever visited with my current Firefox profile and wrote them down. I was also a little bit confused, because I don't think that the things I apparently first ever visited in the Firefox history viewer were actually what I first ever visited.
A month or so later, I took another look at the first few websites I visited in the Firefox history viewer, but they were something completely different this time.
I'm very confused as to why this happens. Does Firefox automatically delete history entries which have a certain age?
Yes, I did click "Older than 6 months", and yes, I am also aware that history entries, which I visit again in the future automatically get moved to the top of the history list. I have also entered the URLs that I wrote down in the search box, but no results. So I assume Firefox deletes history?
EDIT: And if the answer is yes, is there a way to make it so that Firefox never deletes history entries? (I know it affects performance, but I'd rather keep all of my history entries permanently)