If you find a post that you like you can also bookmark it with the bookmark icon. That will also help the curation script find the best content. 
Here’s a small navigation cheatsheet:
| Keybinding | Result | Notes |
|---|---|---|
ctrl-click |
open link in new tab | middle-click also does the same thing |
shift-click |
open link in new window | for saving the context of the other window |
ctrl-shift-t |
open last closed tab | |
ctrl-shift-n |
open last closed window | Firefox-only |
ctrl-w |
close tab | |
ctrl-tab |
move one tab to right | |
ctrl-shift-tab |
move one tab to the left | |
alt |
open Firefox’s top-level menu | there are more history options there |
You can also save a click by right-clicking and then pressing the underlined letter in the menu (t for new tab, w for new window, etc.).
Some people like this extension for organizing a lot of open tabs: