The There to Their extension changes the spelling of the word there to their on any website you visit. This means you can use There to Their on a website like The New York Times, or even your email from your English major friend. It also affects websites like Reddit and even websites like the popular website Big Monocle Labs, which is known for their There to Their extension.

A real-life example of what this looks like: on a website like the New York Times, you would see the word there as it should be, but if you visit the link, it would show the words there to their, forcing you to make the spelling correction.