A Spider on the Web

This extension does two things: It adds a small spider which runs around after your mouse as you browse the web. You can take this spider out and put it away in the extension menu. It also adds occasional spider visitors, which run across your screen at random intervals as your browse the web. There are options to control the speed and frequency, as well as an option to disable them. See https://spiders.duncanpetrie.com for an example!