Page Snooze - A great idea! With this extension you can "snooze" a page. Snoozing a page closes it and sets it to be automatically reopened later at the time you selected. When you are on an open tab you can click on the extension button in the toolbar to snooze it for a week, or right click on the page (not a photo or anything) to snooze it for 5 seconds, 1 to 7 days, or two weeks. Within the options all the snoozed pages are listed for immediate access, and each individual item can be deleted if you wanted. I tested the 5 second snooze and it worked perfectly. Snoozed pages are by specific machine and are not synced.
MondoWindow (website) - You are provided your real time location and shown on an interactive map of what is below through Wikipedia, Flickr, and their own data. Next time you are on a flight this will be a great way to pass the time; just connect to the flight's WiFi. You location is not actually acquired through your device; it obtains the location from other data sources. Because of this you can try the app on their website even if you are not in flight. Flight information (speed, altitude, etc.) is given, along with the ability to see your Facebook friends' location.
Wajam (website) - Search, shopping, and travel planning are all modified with your friends' social shares and comments. This is the type of extension you will either love or hate. It will modify sites to include your social data from Google+, Facebook, and Twitter to show you what your friends thought or recommended. Sites influenced are Google, Bing, Best Buy, IMDb, Yelp, Blekko, TripAdvisor, and many more. For the record, I am not a fan of services like these, but Wajam had an easy setup and did not do anything annoying like Tweeting without permission or updating my Facebook stream. It is worth a look!