When Netscape was dying, I kept a localized copy of Mozilla Firefox. I, too, was unsure about this "new" web browser, even thought I had tried the earlier builds (when it was called, Phoenix and Fire Bird), and it likely had a future.
I don't expect anyone who eventually moves away from Firefox, to suddenly go cold turkey, and drop Firefox like a bad habit. In fact, I think it is best that people keep both and try both, so you can see the difference. But that is because I know the results speak for themselves, with Vivaldi ultimately proving to be the better browser.
#Browser