We use:</p> <ul> <li>Google Analytics, which places a cookie on your device, to obtain metrics on how users engage with our websites. This helps us to improve site content.</li> <li>Convert.com and ShareProgress, which place a cookie on your device, to help us test variations of web content. This helps us offer better web experiences to users.</li> <li>DoubleClick and Flashtalking, each of which uses a clear GIF on our download Firefox page. This helps us measure the effectiveness of our advertising campaigns.</li> <li>Yahoo Dot Pixel, which uses JavaScript on our download Firefox page.