Cookies & other storage technologies
Cookies help us provide, protect and improve the Facebook Products, such as by personalising content, tailoring and measuring ads, and providing a safer experience. The cookies that we use include session cookies, which are deleted when you close your browser, and persistent cookies, which stay on your browser until they expire or you delete them. While the cookies that we use may change from time to time as we improve and update the Facebook Products, we use them for the following purposes:
Security, site and product integrity
Advertising, recommendations, insights and measurement
For example: Cookies allow us to help deliver ads to people who have previously visited a business’s website, purchased its products or used its apps and to recommend products and services based on that activity. Cookies also allow us to limit the number of times that you see an ad so you don’t see the same ad over and over again. For example, the ‘fr’ cookie is used to deliver, measure and improve the relevancy of ads, with a lifespan of 90 days.
Cookies help us serve and measure ads across different browsers and devices used by the same person.
Cookies also allow us to provide insights about the people who use the Facebook Products, as well as the people who interact with the ads, websites and apps of our advertisers and the businesses that use the Facebook Products.
Site features and services
For example: We store information in a cookie that is placed on your browser or device so that you will see the site in your preferred language.
For example: Cookies help us route traffic between servers and understand how quickly Facebook Products load for different people. Cookies also help us record the ratio and dimensions of your screen and windows and know whether you’ve enabled high-contrast mode, so that we can render our sites and apps correctly. For example, we set the ‘dpr’ and ‘wd’ cookies, each with a lifespan of 7 days, to deliver an optimal experience for your device’s screen.
Analytics and research
For example: Cookies can help us understand how people use the Facebook service, analyse which parts of the Facebook Products people find most useful and engaging, and identify features that could be improved.
We also set cookies from the Facebook.com domain that work with the Google Analytics service to help us understand how businesses use Facebook's developer sites. These cookies have names such as __utma, __utmb, __utmc, __utmz, __qca and _ga.
Third-party websites and apps
Our business partners may also choose to share information with Facebook from cookies set in their own websites' domains, whether or not you have a Facebook account or are logged in. Specifically, cookies named _fbc or _fbp may be set on the domain of the Facebook business partner whose site you're visiting. Unlike cookies that are set on Facebook's own domains, these cookies aren’t accessible by Facebook when you're on a site other than the one on which they were set, including when you are on one of our domains. They serve the same purposes as cookies set in Facebook's own domain, which are to personalise content (including ads), measure ads, produce analytics and provide a safer experience, as set out in this Cookies Policy.