Developer Developer Information — Firefox now supports the keepalive option in the Fetch API. This feature allows developers to make HTTP requests that can continue to run even after the page is unloaded, such as during page navigation or closing. — Firefox now supports the Permissions API in Worker Context. — Firefox now dispatches beforetoggle events just before a dialog opens and toggle events after the dialog closes, matching the behavior of popovers. — Methods are now available on UInt8Array to convert to and from Base64 and hexadecimal encodings. This is an implementation of a Stage 3 TC39 proposal, for more details see the proposal text. — Added support for image decoding as part of the WebCodecs API. This allows for decoding of images from the main and worker threads.
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