For the initial release of Ethereum Dapper Legacy, we wanted to focus on the Chrome extension with the Android and iOS versions coming shortly after. While some third-party browsers are built with the option to run Chrome extensions, this can lead to some issues with Ethereum Dapper Legacy. We suggest using Chrome for the most stable experience with Ethereum Dapper Legacy.
That said, we certainly don't want to limit our audience simply based on browser preference! If there's a certain browser you'd like to see us support in the future, you can submit a request directly to our support team (firstname.lastname@example.org) or by submitting a ticket here.