Greasemonkey userscripts in sync with Greasy Fork (https://greasyfork.org/en/users/698254-fujifruity).
Shortcut for Google search results. j/k to move focus, l/h to open in new/background tab.
Lets you create single-key shortcuts to click buttons. Press ctrl+alt+s to open manager.
SimpleShortcuts.mp4
Create a table of contents for the page. ctrl+alt+t to show; click an item to jump; escape or click outside to close.