FL Quirk Master is a simple extension for Chrome developed by lensvol. It falls under the category of Browsers and specifically the subcategory of Add-ons & Tools. This extension is designed to enhance the gaming experience of Fallen London players by providing warnings about Quirks being affected in branch descriptions.

To use FL Quirk Master, you need to have an existing Fallen London account. After installing the extension, simply enter any storylet that has branches which can influence your Quirks, such as the "A letter from your aunt" Opportunity Card. You will notice bold text added to each branch, indicating the effect choosing it will have on your Quirks.

With FL Quirk Master, Fallen London players can make more informed decisions while navigating the game, ensuring that they are aware of how their Quirks may be impacted. This extension is a valuable tool for players who want to optimize their gameplay and fully immerse themselves in the world of Fallen London.