I used facebook's desktop site within a browser on my iPad as I don't like having both the facebook app and messenger app installed; plus I find the normal desktop site interface easier to use. For most features this works ok, but I find that when I tag someone in a comment and then hit enter to post the comment, Firefox for iOS starts a new line rather than posting the comment. This also occasionally happens with normal comments where I haven't tagged someone. As there's no longer a 'Post' button on Facebook, it simply means I can't add my comments on. It's driving me mad. This issue does not occur in Safari and has been a problem for a number of months. I'd hoped the recent heavy overhaul of FF would help but it hasn't changed anything.

Does anyone know how to resolve this?