Save everything in one place and skip the Downloads dialog.
On Android, instead of downloading the file again open it straight from the download dialog.
Skip download destination selection with multiple consecutive downloads by enabling default location updating.
Download Vivaldi from Microsoft Store.
View and manage downloaded files in Vivaldi on Android from the Downloads Panel.
Keep track of your downloads from Downloads Pop Out.
Use an external download manager to download files on Android.
Enable "Download Messages for Offline Viewing and Searching" to access your mail without internet connection.