Mojave 10.14.4 Beta 4

Apple released Beta 4 of Mojave 10.14.4 today. I have installed it and all is working well. The thing I check the most in these Betas is the operation of my mission critical software and the overall speed of things. On these two counts, all seems well in Beta 4. Among the usual bug fixes, it is going to contain Dark Mode for Safari web pages. I am kind of anxious to try that.