when the browser is set to "Always ask you where to save files" and the file is being downloaded via Varia the file is downloaded by both the browser and Varia Application, but when in browser it is unticked (Always ask you where to save files) the file is downloaded only once example

1. here we see , when "Always ask you where to save files" is enabled the file is downloaded twice
   Screencast from 2024-04-14 16-35-54.webm

2. here when "Always ask you where to save files" is disabled the file downloaded only once
   Screencast from 2024-04-14 16-38-59.webm

in 2 we see that file to be download is added in firefox's download drop down but it cancelled automatically and instead downloaded via Varia can this same property to auto cancel and download via Varia done when ask where to download is enabled.

INFO
-OS Fedora Workstation 39
-Browser = Native Firefox RPM preinstalled
-Varia = Flatpak v2024.3.20