Letterboxd List Search is a free Chrome add-on developed by jman777jman. It falls under the category of Browsers and is classified as an Add-ons & Tools subcategory.

This add-on allows users to search lists on Letterboxd, a popular social networking service for film enthusiasts. It is especially efficient when searching smaller lists with less than 2000 entries, but it can still function with larger lists as long as the page is given enough time to load.

To use the add-on, simply enter a film title into the search field located under the right sidebar and hit enter. The add-on will then display the search results. If you want to revert back to the original list, you can refresh the page or perform a search with no input.

It is worth noting that the add-on can only search from the first page of a list. Additionally, it may take around 5 seconds to load the 10,000th film in a list. Overall, Letterboxd List Search provides a convenient way to search for films within lists on Letterboxd.