This post contains a couple tips only relevant to Firefox users. I'll demarcate such snippets with handy dandy 🔥 fire emojis.
Use this page to switch between Gmail's Standard and Basic HTML View. Gmail might ask if you'd like to change your default view.
However! Gmail is quite annoying and'll inexplicably ignore your default. To ignore Gmail's ignorance, navigate to this address:
Replace 0 with a different number (1 2 etc.) to access your other logged-in inboxes.
For the ever-curious, there's a few of these results modes.
Let's configure Gmail Basic for our own nefarious keyboard-navigating purposes.
(ab indicates a then b)
|gk||Goto first label's inbox|
|gs||Goto search field|
|t||Toggle checkbox of current mail|
|ma||Archive checked mail|
|mr / mu||Mark checked mail as read / unread|
|mj / mk||Mark checked mail as starred / unstarred|
|k or ↑||Navigate up in mail list (shift twice as fast)|
|j or ↓||Navigate down in mail list|
|h / l||Goto older / newer mail|