+1 to pocket. I never liked how aggressively it was pushed in firefox[0], but a few years after ignoring it, I tried it one day, and so far I am surprisingly happy with it. Instead of leaving a ton of tabs open or push notifications for articles that I'll never get to, I put them in pocket and sometimes remember to read them.

The TTS feature is pretty nifty (on Android, not sure if there's an equivalent on the web version, though firefox reader mode has TTS). With bluetooth headphones/speaker I can just have a bunch of articles read to me while I'm doing something else.

[0]: I hate random buttons for services I don't use showing up in my browser unexpectedly! I think stuff like this is part of why so many people (at least used to) avoid automatic updates. UI changes that don't immediately benefit the user.