The Mobius extension is an add-on for Chrome browser, and you can use it as a minimap. Mobius is a web-based map. You can view a miniature version of the website.

When you move the mouse, the website will scroll to the position of your mouse. You can navigate with just one click or scroll the whole screen.

To turn off the extension, you have to go to chrome://extensions/ and toggle off the extension switch.

If you want to use the extension without a mouse, you can go to chrome://extensions/ and then you can find a "Keyboard Shortcuts" section.