Sets the #WebKitDownload:allow-overwrite property, which determines whether the download may overwrite an existing file on disk, or if it will fail if the destination already exists.
the new value for the #WebKitDownload:allow-overwrite property
2.6
See Implementation
Sets the #WebKitDownload:allow-overwrite property, which determines whether the download may overwrite an existing file on disk, or if it will fail if the destination already exists.