it would be the perfect browser, if it didn't have the problem with passwords after reinstalling Windows.
What kind of problem are you talking about? If you lost your password after reinstalling Windows it's because they are encrypted using a unique key that is tied to your user account and you can't retrieve it even when you create the same user on a new Windows installation. The same would happen if you'd use Opera or Chrome and tried to restore your passwords manually.
There is a workaround for this - you can export/import your passwords manually after enabling the feature in vivaldi://flags/#password-import-export. It'll create a plain text file, so you better keep it safe.
Please post such feature wish at Vivaldi's bug report page.
How to do a bugreport for Vivaldi
Report the bug at https://vivaldi.com/bugreport/
Describe the issue as precise as you can.
If you use any extensions please give information which ones you use.
If you have a URL or a own testpage which can checked, add it to the bugreport.
If you have own testcase files (HTML, CSS, JS etc.) add them to the confirmation mail you get after report.
If you have a screenrecording video, you can attach it to give the developers a hint how this might happen or look like.
You will get a bug confirmation mail and in a reply to this mail you can add more information and files as attachments for the testers and bug tracking team.
Thanks in advance for helping us to make Vivaldi better!
As of the moment, with Vivaldi 1.7, I cannot find a really good solution, but for whoever may care, here is a stop-gap measure that I managed to cobble together. This I tested on Linux (Ubuntu 16, if it matters). Might work on other platforms too.
PROBLEM: Start another (existing) profile without closing any of the currently running Vivaldi windows.
HACKY SOLUTION (from the command line):
Discover the name of your profile folder
Let's say that my profile is named "weather"
I do so:
egrep -l '"name":"weather"' ~/.config/vivaldi/*/Preferences
I see something like this:
Now start the profile:
vivaldi --profile-directory="Profile 2"
You will get a message like this, if Vivaldi is already running:
Created new window in existing browser session.
Note that you DO NOT need to background the job, i.e. no need for a & at the end. At least if Vialdi is already running. But it will probably not hurt much if you add it. Dunno!
@Pesala Fantastic, thanks! Seems like a pretty good browser so far. It's almost a little unsettling noticing how many great features Vivaldi has that USED to be present in other browsers, but that quietly disappeared over time.