When comparing SeaMonkey vs Opera Neon, the Slant community recommends SeaMonkey for most people. In the question“What are the best desktop web browsers?” SeaMonkey is ranked 27th while Opera Neon is ranked 51st. The most important reason people chose SeaMonkey is:
Wraps all your internet stuff together. It's like it's Firefox and Thunderbird all wrapped into one, and it kinda is. It's the continuation of the project both of those were extracted from.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Full internet suite
Wraps all your internet stuff together. It's like it's Firefox and Thunderbird all wrapped into one, and it kinda is. It's the continuation of the project both of those were extracted from.
Pro Not bloatware
Pro Designed for usability, not looks
Pro Modern look
It is a very modern version of Opera. It looks like a desktop app instead of a web browser.
Pro Futuristic interface
Opera Neon innovates with its clean aesthetic pleasing interface.
Cons
Con Bloated with unnecessary features
Seamonkey has a browser, email client, and even an IRC chat. Too much bloat! It doesn't do one thing, let alone do anything well. It should be avoided.
Con Looks very old and outdated
Con No Addons
not a single adblocker or privacy addon that was useful
Con Owned by Chinese Consortium
Pretends to be a Norwegian company, but is actually a Chinese company. Opera does not respect user privacy and is not trustworthy!
Con Not meant for general use
This browser is not meant for general use. It only exists, because the Opera developers had some ideas for the user-interface, and wanted their users' feedback. If you want a browser that you can use day-to-day, something with bookmarks and security updates, look elsewhere.
Con Bad UX
The usability is not the best since the left and right bar take up space and there is no way to resize them.
Con Never updated
The Opera folks came out with a browser as an experiment - and then they essentially abandoned it. It really was great, but since they never planned to support/update it and it's closed-source, it's not recommended.
Con No Adblock
There is no Adblocker like in the original Opera.
Con No extension support
Due to the way the browser is built, it does not support Chrome extensions even though it is Chromium based. Opera extensions are not supported either.