• Added the blob.isClosed property. (@TimothyGu)
• Fixed the file.lastModified property to be on File instead of on Blob. (@TimothyGu)
• Fixed the file.lastModified property to default to the time of the File object's creation, not the time that the property is accessed. (@TimothyGu)
• Fixed a minor edge-case regression where non-HTML elements with the name "iframe" became focusable in v9.7.0.