Disable incorrect outdated Browser warnings

I see there was a plugin for it but its very dated. I have just switched to Waterfox since Firefox updated to 57, revamped its whole system and kicked out many extensions I use constantly. I was also having major issues with these upgrades not working properly with the wordpress dashboard. (I’d click something in dashboard, the url would change but it wouldn’t go to the page.)

There are numerous browsers like this, all of whom are based on mozilla firefox code but going their own chosen route for upgrading separate from the major changes. However I am getting a ‘outdated browser’ nag because it THINKS I am in firefox. Does anyone know anyway to permanently kill this?