1901883 - iframe is not work for background script

Status: RESOLVED INCOMPLETE

(WebExtensions :: Untriaged, defect)

Description

[Robert Vitonsky]

Attachment: 2024-06-12_00-26.png

User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:125.0) Gecko/20100101 Firefox/125.0

Steps to reproduce:

• create addon with manifest v3
• create and insert iframe element in background script. I've tested with a HTML page included in addon bundle

Actual results:

• iframe created, but are empty. No any scripts and elements there

Expected results:

• iframe created with all content of HTML page
• it is possible to message iframe with postMessage

Comment 1

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

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

[Robert Vitonsky]

This problem may be solved if you will append iframe into document first and then set src:

const iframe = document.createElement('iframe', {});
iframe.setAttribute(
  'sandbox',
  'allow-same-origin allow-scripts allow-popups allow-forms',
);
document.body.appendChild(iframe);
iframe.src = '/offscreen-documents/translator/translator.html';

Comment 3

[Robert Vitonsky]

But problem still exists if you will set src and then will append iframe into document:

const iframe = document.createElement('iframe', {});
iframe.src = '/offscreen-documents/translator/translator.html';
iframe.setAttribute(
  'sandbox',
  'allow-same-origin allow-scripts allow-popups allow-forms',
);
document.body.appendChild(iframe);

Comment 4

[Alex Cornestean]

Hello,

Would you be so kind and attach a test extension showcasing the behavior you mentioned?

Thank you !

Comment 5

[Rob Wu [:robwu]]

We haven't received a test case, so I'm closing the bug because it is not actionable.

We'll re-open if there is a test case that demonstrates a bug.