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4 changes: 4 additions & 0 deletions files/en-us/mozilla/firefox/releases/139/index.md
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Expand Up @@ -39,6 +39,10 @@ This article provides information about the changes in Firefox 139 that affect d

#### DOM

- The {{domxref("HTMLDialogElement/requestClose", "requestClose()")}} method of the {{domxref("HTMLDialogElement")}} interface is supported.
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This allows developers to conditionally prevent a dialog from closing by providing a [`cancel` event](/en-US/docs/Web/API/HTMLDialogElement/cancel_event) handler.
([Firefox bug 1960556](https://bugzil.la/1960556)).

#### Media, WebRTC, and Web Audio

#### Removals
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