Just like the title says:

a small but useful feature would be to have the option to save posts while browsing the main page instead of having to open each one up to save it. Sometimes the post opens up another site that slows down or crashes my janky old phone.

Link-hoarders like me will really appreciate being able to save all the interesting titles in one spot instead of bogging down our browsers with hundreds of tabs.

Fun fact: if you open more than 99+ tabs in Chrome on Android it stops displaying your tab count and just shows (:D)