You can also try these related scripts:

• xkcd+ - Add buttons on xkcd.com to share on Twitter, Tumblr, Pinterest, etc. as well as add button for explainxkcd.com.
• XKCD tooltip - This script puts the xkcd tooltip under the picture and adds a link to explainxkcd.com. It does the same work with what-if tooltips. Finally, it adds links to the printed comics sold in the store.
• [grom] phpBB forum helper - phpBB: view user's posts and topics; cleans (tab) titles; removes ads and hidden metadata.
• xkcd Arrow Keys - Adds the ability to use arrow keys to move to the next or previous comic/article on xkcd.com.
• xkcd buttons Alt+Transcript+Explainxkcd - add btns to view transcript and alt and explainxkcd