That’s what I use, U Block Origin, and even with it turned off for the web viewer page, it wouldn’t let me log in. On Firefox or Chrome, had to disable UBO in extensions on both browsers, so then no UBO active on any web pages. That’s on my PC’s, one connected to my big screen TV, and have a 2nd smaller monitor I put the web viewer on. I since found better success using Edge, so I could re-enable UBO on the other 2 browsers. Tried Brave browser, but problems with that as well. But as far as mobile (Android) I just use the Wyze app.