2049162 - Firefox does not warn about overwriting files when downloading

Status: RESOLVED DUPLICATE of bug 2047865

(Firefox :: File Handling, defect)

Description

[Kamil Jonca]

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0

Steps to reproduce:

I tried to open (this is epub file):
https://zajdel.art.pl/wp-content/uploads/2026/06/zajdel-za-rok-2025.epub
and downloaded this
then I tried to open https://zajdel.art.pl/wp-content/uploads/2026/06/zajdel-za-rok-2025.epub
and downloaded this.

Actual results:

file was downloaded twice. Second download overwrote the first without warning.

Expected results:

When download second time I expect warning about overwriting the file.

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'Firefox::File Handling' component, but is not confident enough to move the bug to that component.

Comment 2

[Kamil Jonca]

Version 151.0.3
Build ID 20260601110758
User Agent Mozilla/5.0 (X11; Linux x86_64; rv:151.0) Gecko/20100101 Firefox/151.0
OS Linux 7.0.13+deb14-amd64 #1 SMP PREEMPT_DYNAMIC Debian 7.0.13-1 (2026-06-19)

warns as expected.