2050825 - 'save as' misses files' extensions

Status: RESOLVED DUPLICATE of bug 2050002

(Core :: Widget: Cocoa, defect)

Description

[gluker]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:150.0) Gecko/20100101 Firefox/150.0

Steps to reproduce:

1. Access https://vpn.fo/images/logo.svg
2. CMD+S to save the 'logo.svg'

Browsers:
153.0a1 Firefox Nightly (2026-06-06) (aarch64) on MacOS 12.7.6
154.0a1 Firefox Nightly (2026-06-26) (aarch64) on MacOS 12.7.6

Same behavior exists for other file types as well:
https://vpn.fo/images/logo.png

Actual results:

File saved as 'logo' without '.svg' extension

Expected results:

File saved as 'logo.svg'

Comment 1

[BugBot [:suhaib / :marco]]

The Bugbug bot thinks this bug should belong to the 'WebExtensions::Untriaged' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 2

[gluker]

This doesn't seem related to WebExtensions.
The issue is with the macOS save dialog not appending file extensions when saving files.
Upon auto saving Firefox adds extension to downloaded file.

Bug with 'save as' missed extension wasn't in Firefox 152.0a1 26-05-10

Comment 3

[Alex Cornestean]

Hello,

The BugBot mistakenly presumed that the use of the word “extension” meant “WebExtensions” and changed the Product of the report.

Reading the description of the issue, WebExtensions are not involved in this.

I’m changing the Product back to the original one, as this seems to be a Firefox issue.

Comment 4

[Stephen A Pohl [:spohl]]

This is being addressed in bug 2050002.