57 just entered Beta. It will be released on the 14th November. That's a whole 6 weeks still. It also is not the end of all Firefox development. Just because i

57 just entered Beta. It will be released on the 14th November. That's a whole 6 weeks still. It also is not the end of all Firefox development. Just because it's not necessarily done for 57, doesn't mean that it won't get fixed or that it will "NEVER" work well. It's also nonsense to make assumptions about what will work in Firefox in the future based on what works in Chrome, as Mozilla is introducing additional APIs that Chrome does not have. If you're happy with Vivaldi, your thing. But there also is Firefox 52 ESR, which will continue to get security updates until the 26th June 2018.