This browser came to me as I was a longtime opera user, in most cases you have a reborn or updated browser which you once had (opera) Upon installation,go through each setting, to customize it to your needs and liking. Vivaldi uses Chrome extensions. One of the features I like is the zoom feature*bottom right) and love the downloads manager; receiving all information, nicely laid out is informative; you also have your download speed and destination.
The developers are from the “Old opera browser” It is a wonderful browser with loads of options and features. Once you have configured it to your liking; this includes the wonderful interface, you will have an awesome browser; you have a capture tool, and a web panel to have two sites open.