Unfortunately, my main point of using original pwgen is lost. The passwords are no longer deterministically computed from input password and current domain :-(

It was a simple nice alternative to synchronization of passwords among multiple devices, with similar security tradeoff.

What this really needs is an option to just copy the password to the clipboard when you click the toolbar icon - without opening the window, without having to click the "copy to clipboard" button. The extension that I'm looking to replace did this (it's fallen victims to WebExtensions). THe "Direct copy" option seems to promise something like that, but checking it doesn't do anything.