Visual Bookmarks is a utility that enables Yandex users to visit their most frequented websites in a graphical display with a visual theme of the user's choosing. This addon will allow the user to see a "speed dial" of their most visited sites, which will update over time to display the most recently accessed websites for your version of Firefox based on the local browser history in your user profile folder. A Firefox user does not need to log into a Yandex account to use Visual Bookmarks. In order for Visual Bookmarks to deliver this utility to the user it references: (Extracted from https://addons.mozilla.org/en-US/firefox/addon/yandex-visual-bookmarks/) Local data stored in Firefox that saves the most recent URLs a user has visited as well as bookmark status of those URLs, IP address location to determine the country/language in which your preferences may be customized, frequency of visit to the user's top sites, extensions or themes that are specific to the user's Firefox, notifications that are posted to the user, current or past active tabs.
Visual Bookmarks use associated data above to deliver a personally customized interface. Data is not transmitted outside of the user's version of Firefox. Specific actions to request new session initiation to history tiles, user's local weather or stock market prices, user's access to their own Yandex account are specific outbound requests to those Yandex services.
Like all Yandex products and websites, are governed by the full protections of our privacy commitments detailed here: https://yandex.ru/legal/confidential/?lang=en