I want to be logged in so I can do most things on Reddit like post and comment. I want it to be a web frontend rather than an app because I keep many tabs on Reddit open in my browser while doing research on things (like digital privacy for instance!). I did some searching and didn’t find any currently working frontends with login support.
I know you want a webapp, but Red Reader still works last time I checked. It’s an open source android app. It still has API access since they don’t make money. Perhaps something to use away from your computer.