Dominic Maas has developed an extension for Google Chrome and Mozilla Firefox that enables users of these browsers to sync their activity across devices via Windows Timeline. Among browsers, Microsoft Edge is the only one with Timeline support as it requires developers to enable explicit support for Microsoft Graph in their apps.
https://www.notebookcheck.net/Developer-brings-Windows-Timeline-support-to-Google-Chrome-and-Mozilla-Firefox.316618.0.html