I use Firefox 51 at work which is my 'personal account' browser to send messages through. I use the web site of course which works most of the time, but often the SMS pushes can be around 5 minutes or more delayed. I also RARELY get responses sent to Firefox, but that is okay since my Android Wear gets them anyway. As a test, I installed the Chrome extension and it worked much faster and better, but it has an issue with dual accounts. My job uses Google Webapps for their domain so I have to stay logged into Chrome with that. When I log my personal account it though Join, it worked great, but then insisted on asking for permissions for my work account which I kept telling it to deny but it kept prompting. I would prefer much better to use Firefox if I could since it auto destructs my logins upon close and I like to keep it that way.