Firefox 156 offers performance improvements including faster startup for its PDF viewer and reduced CPU usage when viewing large JPEGs. It now uses a more efficient method to scale down images during decoding, saving memory and speeding up the process. The built-in PDF viewer launches its worker component sooner for quicker access. Sponsored suggestions are now live in the address bar for users in France, Germany, and Italy, but can be disabled. This release also includes various bug fixes. Future update, Firefox 157, will add support for the JPEG XL image format. Mozilla emphasizes user control over AI engagement, offering a dedicated AI controls section. Users can opt in or out of specific AI features like translations and tab suggestions. Smart Window, an integrated AI experience, uses shared context to assist with tasks like summarizing and planning. Users can also block Google's AI Overviews using browser extensions.