This is a follow-up to my quest for the website I visited on September 12th, 2023 on firefox browser, no where the history tab (ctrl+leftshit+H) mentions the exact date
Then right-click on the category header on that list (maybe "Name", "Tags", "Location") and add a "Most Recent Visit" column, since it looks like that's not visible by default for me.
If what you want is the date that you added the bookmark, it looks like "Added" is what you want, can also add a column for that.
Ah. It looks like the same UI is used for "bookmarks", and the "added" field is for when the entry was added as a bookmark. For non-bookmark items, there's no "added" date.
So you can look for a site by the last time you visited it ("Most Recent Visit"), but not by the first time, I reckon, not unless you bookmarked it then.