add alow-downloads to the iframe

[SaraVieira]

I tested in:

• Chrome: Will block any downloads done automatically
• Firefox and Brave: Will show you a download button and not download automatically
• SaFari: will show a massive warning asking you if you wish to download that

If put on page load no website will download files automatically

Not added automatically to embedded since that is in control of the user

closes #4739

[lbogdan]

Build for latest commit 17fa0af is at https://pr5163.build.csb.dev/s/new.

[codesandbox-ci]

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Sandbox	Source
Notifications Test	Configuration
relaxed-sutherland-esv6m	Issue #4739

[mohdashraf010897]

@andrasbacsai The issue still persists.

Replicable CSB - https://ohpo6e.sse.codesandbox.io/

Click on any one of the given link-buttons that will let you save a CSV/ JSON file.

the console shows

Browser: Chrome (Version 104.0.5112.79 (Official Build) (x86_64))

[andrasbacsai]

I'm not working for Codesandbox.

@JamesACS, could you please check the issue? Thanks in advance.

[JamesACS]

@mohdashraf010897 - This issue is two years old. Please could you create a new one following the bug report template?