My older Firefox history has vanished

I don't think it's possible to ACCIDENTALLY hit Shift + ⌘ + Delete, lol... And according to the page I looked it up on, that empties the trash, which I don't think affects history. I don't think anything I could've done that long ago would be like a time bomb suddenly going off now, either…? I DO have Time Machine Backup, but it doesn't back up browser history, just files.

Does that really mean that there's no way to retrieve the missing history without erasing the 15 months of history that I still have? There's no way to safely hold the recent history aside and merge both pieces of history back together?

That stuff is WAY beyond my technical knowledge and abilities, and I have no idea how anything there would apply to my situation. Given the size of the history file that someone in another forum talked me through locating, it looks like the old history exists in the system somewhere… Even if I had to access it somewhere other than the normal way, it would really help to still have it…

There's no need to download an unknown app to find that file; a normal Finder search finds it. I have found it, opened it up using a website that can crack it since I don't have an app that will open it, downloaded all the available data, searched through all the files of what look like gibberish to find the one that contains any history data… Which only goes back 15 months, just like Firefox history accessed the normal way does.

If any history records older than that exist anywhere, which is unfortunately working less likely, it's somewhere ELSE.

I'm still hoping that someone can help me with this. I'm continuing to lose my oldest history, although not on a day by day basis.... Now my history goes back a year, 3 months, and 17 days. So, back to February 11; previously, it was January 21.

I did. There's no way to reach a human being from that link. You can try a million search terms to see if you get any appropriate articles… which I didn't… or, it will direct you back to this forum. I'm beginning to think there's just no solution to this problem, lol!

No, sorry, or I would've responded at that time… Unfortunately, from someone else mentioning something like that, either here or on another forum, I discovered that the time machine only backs up that kind of stuff for very short period of time, not remotely long enough to recover any history. It was a good thought, though!

I found places.sqlite, and a website that would open it, and downloaded… Something, tables with no dates and no way to sort them… Basically gibberish…?