> I don't see how this is any better than opening a browser tab with a mail client in it? What mail client are you comparing this to? At least compared to most

> I don't see how this is any better than opening a browser tab with a mail client in it? What mail client are you comparing this to? At least compared to most webmail clients I've used, these points from press release are obvious enhancements: * Combine all your email accounts and manage them easily from a single client * Indexed offline mail access * Built-in feed reader * Optionally offline calendar I can't speak to the performance issues you've had since I haven't used Vivaldi. I find offline access and backups of e-mails important, personally.