I would look at browser cache and if needed use data recovery software look for old copies such as testdisk.
Chrome, Firefox and new Chromium based Edge all use SQLite to store their data.
Example: Chrome store download history here
C:\Users\<username>\AppData\Local\Google\Chrome\User Data\Default
under the History SQLITE database
You can use SQLITEMAN to examine the data structure. It also shows where the download was from.