Global Preferences (saved in this browser, honoured everywhere on the site)
Number of Results  Ten is faster. There are only 18 pages, so 50 shows everything.
Results Window
Archive Filter
Off by default, deliberately. The things I looked at and didn't build (the edtech scan, the stores) are part of the record.
Text Size  Same control as View > Text Size in the menu bar.
Interface Language English — or see Language Tools for Hacker and Pig Latin, both of which genuinely work.
Preferences are stored with localStorage under the gp.* keys. Nothing is sent anywhere — there is no server here, only a folder of files.