If you open 100 tabs on Google Chrome, the tab count on the upper right corner of the screen will change to a smiley face instead of showing the number of tabs. This is an Easter egg that Google has hidden in its Chrome app, and it works on both Android and iOS devices. The smiley face is a way for Google to avoid increasing the size of the tab count box to display three characters, which would be necessary if the number of tabs exceeded 99. Instead, the smiley face has two characters, and it is a fun little Easter egg that lets you know you have 100+ tabs open.