For Fasterize, the "cookies" ensure the proper functioning of the solution and make it possible to guarantee the reliability of the engine optimization by recognizing a visitor as being unique during his various visits (knowing that he is the same Internet user without knowing who he is). These "cookies" store in particular the application of the optimization setting to which the user is submitted with the sole purpose, to be able to represent the same version during these subsequent visits. This system does not cause differences in behavior. These "cookies" do not store any personal information about visitors. 

Fasterize does not collect or store any data to identify a visitor via these cookies. 

Here is the complete list of cookies that can be placed on your site by the platform for visitors to the site: 

The cookie fstrz = [true | false] : this cookie allows to activate or deactivate the optimizations for a given user. It is used as part of an A / B test to divide incoming traffic into two populations: an optimized population and a non-optimized population. In addition, it is posed by the browser extension when the buttons  See optimized pages | See unoptimized pages  are in a hurry. The lifetime of the cookie is equal to the test A / B period defined in the account settings. 

The cookies  frz_of_id = UUID and frz_of_id.sig:these cookies are used as part of the overflow page system to filter the sessions allowed to view the site. This cookie is only placed if the overflow page is enabled on Fasterize. The lifetime of the cookie is one hour. 

The cookie  fstrz_vary: this cookie is used when using the variation of cache of Fasterize according to the parameterization defined in the engine. It serves as a variation identifier for the page. The cache variation is used when a page varies according to the language, the country, the selected store ... The lifetime of the cookie is one year. 

The cookie frz-forced-state = true: this cookie is set by the browser extension when the buttons  See optimized pages |See unoptimized pages are in a hurry. This cookie makes it possible to force for a session a state of optimization different from the activation of the engine. The lifetime of the cookie is equal to one year.