Access Keys are a way to access key functionality of a web page through keyboard shortcuts. Each website can define these shortcuts, so that the website is easily accessible from a browser.

To view the list of shortcuts open Quick Commands and start typing “Show Webpage Access Key Shortcuts”.  Alternatively, you can set a Keyboard Shortcut or a Mouse Gesture for this action in Settings.

Use the shortcut Alt Shift / Ctrl ⌥ and the listed key to run the shortcut on the webpage.