Recs.
Updated
Vivaldi is a web-browser founded by the ex-CEO of Opera. The browser philosophy is to adapt to the user offering multiple options. The focus is to offer built-in features to enhance the web experience.
SpecsUpdate
Pros
Pro Tab behaviour can be customised
The order you toggle, open, close or clone tabs can be modified to match a workflow that best works for you. For example you can choose tabs to toggle in recent order so you can go back and forth between the last most useful tabs without needing to change their position on the tab bar.
Pro Allows navigating to the next page without searching for the link
A feature called fast forward puts a dedicated button before the address bar that is designed to help you navigate to the next page of a multi-page article, forum thread or search results without having to hunt for the link.
Pro Built for power users
Vivaldi includes lots of niche functionality such as the ability to move tabs to any side of the screen, turn images on and off, or render pages with monospace fonts.
Pro Add websites as web panels for easy access
You can add sites as panels for easy access them. It allows reading two websites side by side with a simple click on the panel button. Useful for social networks, like WhatsApp, Telegram, Facebook & Twitter. Panels can be hidden when not in use.
Cons
Con Advertisements in the bookmarks
By default: Vivaldi has a number of websites (such as Amazon) already bookmarked. New bookmarks may be added to the speed-dial when the browser updates. These bookmarks can be deleted, same as any other bookmark, but that will not stop new bookmarks form being added.
Con Proprietary
Vivaldi is not open-source, but it's also not closed. Kind of a source-available software.
C++ code is under a BSD license and can be downloaded on https://vivaldi.com/source/
And the Web code can be un-minified from the installed files.
Con No option to open saved tab stack as... tab stack!
You may save stack, but you can open it as separate tabs. Interesting that when you save session with stacks, you'll be able to open the stacks with inner settings of page tiling (size and zoom) as well. Contradiction worth of shame.
Con Comes with many ads
After installation the first thing you have to do is to remove all the default bookmarks and quickdial links which is really annoying. There is more minor stuff like the default search provider or your start page things that could be easily managed with a wizard at the first startup.
Con No silent background updates
Unlike most modern browsers, Vivaldi doesn't have the option to update silently in the background. It gives you a dialog box when an update comes out. Worse, the box doesn't warn you that not updating the browser could lead to security risks. That could be pretty bad for your average joe, who doesn't know computers that well.
Con Not available on your Phone/Tablet
Vivaldi is currently only available for desktop operating systems (Windows, Linux, Mac). Though the developers have already said that they plan to release it for mobile platforms.
Recommendations
Comments
Flagged Pros + Cons
Pro Includes tools for annotating web pages
A notes panel allows leaving notes on webpages and can include screenshots for reference and have tags and organized in folders to help manage them.
Con Still in beta
The browser can often be buggy, many features, like the built-in email client, aren't there yet, etc.
Out of Date Pros + Cons
Con No sync between devices
Vivaldi does not provide any sync. software or method to sync with other devices such as iOS, Android or your other PC's.