CSP Compatibility Issue with SweetAlert2 on Firefox

[krug91]

SweetAlert2 causes issues with strict Content-Security-Policy (CSP) configurations when used in Firefox. Specifically, SweetAlert2 fails to function as intended due to its reliance on inline event handlers. Notably, this issue is observed in Firefox but not in Chromium-based browsers (e.g., Chrome, Edge). This discrepancy highlights a browser-specific enforcement of CSP rules.

Steps to reproduce the behavior:
Configure a web application to use the following CSP: Content-Security-Policy: script-src 'self';

Expected behavior
SweetAlert2 should work seamlessly across all modern browsers, including Firefox, without requiring any CSP policy adjustments that weaken the application's security posture.

Firefox 134.0.1