The best browser for you depends on what you need in a browser. Tons of features or a simple as possible, it depends on the user.
I would say it like this:
Best mainstream browser: Chrome.
- Pro: Largest userbase. It's fast, gets regular security updates and if you use google services, it's easy to use them when you log in into the browser.
- Contra: Needs quite some ram and battery if you use a laptop + Google and privacy are two oppisites.
Best out-of-the-box browser: Opera.
- Pro: The best of Chromium, yet simplistic and has some basic built-in addition like VPN, battery saving and Adblocker. Als good sync integration with their mobile browser.
- Contra: Recently sold to Chinese consortium, so it's uncertain what the future will bring for Opera.
Best browser for Open source freaks: Firefox
- Pro: Open Source, big changes with their electrolysis (multi-process), customisation
- Contra: Recent decisions made by Mozilla are not so great. Features get removed and some addons will stop working in the next versions.
Best Overall Chrome replacement: Slimjet
- Pro: No Google tracking. Adblocking and great downloading features, Social network integration
- Contra: Less known, Slower updates
Best Open source browser that is like in the good old Mozilla days: Palemoon, Waterfox and other gecko clones.
- Pro: Open Source and not affected by stupid Mozilla decisions
- Contra: Mostly developed by a very small team, so changes and updates may require waiting a bit longer.
Best Standard browser: Edge
- Pro: Integration with MS services, relatively new and still in active development. Doesn't need much resources. Good integration for tablets.
- Contra: In my opinion months after the launch still hanging behind other browsers, especially in terms of extensions.
Best Feature rich browser: Vivaldi
- Pro: They want to get as much as possible features without extensions right into the browser. New and fresh look. Frequent updates. Privacy friendly. Mail client and sync is coming soon.
- Contra: Still a bit slow although being worked on.
Best Privacy browser: Brave
- Pro: Made by previous Mozilla developers. Has a system to avoid ads but still give the sites revenue. Has much privacy options
- Contra: Still in early development. Quite simplistic in terms of other features
And there are still so much other Chromium and gecko clones that are maybe what you are looking for. For example: Yandex browser, Torch, Cyberfox....