[EDIT2] (at top to make sure visibility)
All good, as explained in one of the posts. I shouldn't expect pressure regulator to work directly at faucet.
(Use tee or splitter) Here is video https://youtu.be/gp4aquT19LA
[Just started looking into drip irrigation]
I'm using rainbird 25PSI pressure regulator along with pressure guage. (https://www.amazon.com/Rain-Bird-HT07525PSI-Irrigation-Regulator/dp/B0049C5FZA)
Pressure guage measures about 70PSI without regulator (directly at garden faucet), however this doesn't really change even after using pressure regulator.
Am I misunderstanding pressure regulator? or is guauge/regulator broken?
[EDIT]
Here is what I'm talking about (in both cases it reads about 60PSI):

Haha that's funny. Will try waterfox as replacement for Firefox. Firedragon (zen) is for vertical tabs.