MEGA.nz files go missing

[obvionaoe]

Hey, basically the problem I'm having is that every time I download something through MEGA it downloads but Vivaldi doesn't move it to the Downloads folder like Chrome did, so I can't find my files!
I've already tried looking at the Vivaldi downloads panel but it isn't recognised there either.
I also tried looking at the folders that are supposedly default for MEGA but I can't find it there either.

What can I do?

And is there a way to make Vivaldi recognise MEGA downloads?

[iAN CooG]

I have installed the mega.nz extension and download files almost daily from it, after the file finishes downloading I get a save requester popup, I press Save and at that point it's saved to my default download location.
There are issues if you try downloading multiple files tho, you could miss a save requester if they finish at the same time or a file gets finished while the previous requester was shown and you failed to press Save in time.