firefox -- Use-after-free

https://bugzilla.mozilla.org/show_bug.cgi?id=1995686 reports:

• Use-after-free in the WebRTC: Audio/Video component.
• Same-origin policy bypass in the DOM: Workers component.
• Mitigation bypass in the DOM: Security component.
• Same-origin policy bypass in the DOM: Notifications component.
• Incorrect boundary conditions in the JavaScript: WebAssembly component.
• Spoofing issue in Firefox.
• Use-after-free in the Audio/Video component.
• Mitigation bypass in the DOM: Core and HTML component.
• Race condition in the Graphics component.

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