Package: firefox-esr Version: 115.3.0esr-1 I only report it now because I noticed this recently, but I don't think I had the issue in last may.
On one of the sites I have to use professionally, after a file was uploaded and I disconnect from the site and close the tab, lsof shows the file handle is still used by firefox ; and if the file is on an usb key, I have to force the ejection as it means it's seen as busy (which is how I detected the issue). Cheers, J.Puydt