If you open up add-ons find uBlock Origin, press the "go to dashboard" button the first page has a bunch of checkboxes. At the bottom of the first group there

If you open up add-ons find uBlock Origin, press the "go to dashboard" button the first page has a bunch of checkboxes. At the bottom of the first group there is a check box called "I am an advanced user ..." Check that and now you have a mini uMatrix in your uBlock Origin menu. Global block/allow is the left column, local (to the current domain) block/allow is the right column. I always globally block 3rd party scripts and frames and locally allow things like ajax.google.com when sites are borked. Apparently now I need to start locally blocking 1st party scripts on sites too because of shenanigans like this.