If starting a browser with a Windows shortcut target like this:
"C:\Program Files (x86)\Vivaldi\Application\vivaldi.exe" --incognito
then the browser runs in Incognito mode or Private mode.
When a browser runs in Incognito mode, downloads do not appear in the extension's area "Files you download appear here".
In that situation, downloads do appear normally in the browser's standard tab for downloads. Then also, a badge count is shown as expected on the extension's toolbar icon during downloads.
Download Manager version 2.2.1
Browser: Vivaldi version 3.8.2259.42 (32 bit)
OS: Windows 8.1 (64 bit)
If starting a browser with a Windows shortcut target like this:
"C:\Program Files (x86)\Vivaldi\Application\vivaldi.exe" --incognito
then the browser runs in Incognito mode or Private mode.
When a browser runs in Incognito mode, downloads do not appear in the extension's area "Files you download appear here".
In that situation, downloads do appear normally in the browser's standard tab for downloads. Then also, a badge count is shown as expected on the extension's toolbar icon during downloads.
Download Manager version 2.2.1
Browser: Vivaldi version 3.8.2259.42 (32 bit)
OS: Windows 8.1 (64 bit)