1924362 - Native JavaScript popups (alert(), confirm(), prompt()) don't display text in Firefox Responsive Design Mode

Status: RESOLVED DUPLICATE of bug 1918617

(DevTools :: Responsive Design Mode, defect)

Description

[Mike]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:131.0) Gecko/20100101 Firefox/131.0

Steps to reproduce:

I've encountered an issue where native JavaScript popups like alert(), confirm(), and prompt() don't display text in the Responsive Design Mode of Firefox Developer Tools. The popups appear, but their content (the text) is missing. This issue does not occur when using Firefox outside of the Responsive Design Mode, and all popups work fine in a normal browsing context.

Actual results:

The popups (confirm(), alert(), prompt()) are only showing the buttons, but no text. In the case of prompt(), only the input field is visible, but the descriptive text is missing.

Expected results:

The popup should display the text content, just as it does in a normal browsing context.

Comment 1

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

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

Comment 2

[Julian Descottes [:jdescottes]]

Thanks, this should be fixed in Firefox 132, via Bug 1918617