Alright, this is a big one! A topic that can not be taken lightly! Now Secondlife website does have it's own download for a viewer. But that is not the only one you can choose from!
There is Phoenix, Firestorm, Alchemy and Black Dragon just to name a few.
When I started and was constantly in SL when it first started I struggled with staying online, so I switched viewers. I have tried Phoenix, and I run with Firestorm. Now both are amazing and made by the same creators basically with some new names here and there! But I picked Firestorm because it ran slightly better on my laptop! Let's face it people when it comes to hardware laptops can get the raw end of the deal!
Alchemy and Black Dragon. I have ran but they are both more advanced settings, so I use them a lot to do profile pictures because the pictures turn out amazing, You can run them as a day to day viewer I have heard good things on both of them.
I know for a fact that Firestorm is updated regularly to keep on top of all the SL new things and such that has come about the last couple years. With that being said, which would you choose to take the leap into SL?
Phoenix>>>https://www.firestormviewer.org/downloads/
Firestorm>>>https://www.firestormviewer.org/downloads/
Alchemy>>>https://alchemyviewer.org/pages/downloads.html
Black Dragon>>>https://niranv-sl.blogspot.com/