I am not sure, possibly not. Of course this isn’t the ideal scenario, this is why port forwarding is still recommended, but you probably still get away without using it, if you download mostly freeleach and popular torrents. That way you can 1:1 the ratio during the download.
Unfortunately, as much as I like and use firefox on both pc and mobile, chrome and chromium based browsers dominate the market. It doesn’t help that they come pre-installed in both cases.