When i tried to import data in settings, i just couldn't see the importing option from Opera. These were available by the way: Chrome, Internet Explorer, Edge and also custom HTML file.

I use Google Drive very frequently so this bug has heavy impact on me.
I just can't see the size of the file.(i wasn't able to see on Opera too)
I can see download speed on mini-download bar(right-top) but i can't see download speed on Downloads Page/Tab.

I don't know if the download speed is not working for the unknown sized files but it is annoying.