How to block 1st party scripts everywhere by default

By default, out of the box, uMatrix blocks all 3rd-party script, but allows 1st-party scripts to run on any web site.

If you wish, you can set up uMatrix to block all scripts by default everywhere with only a few clicks.

By default, 1st-party scripts are not blocked:

Select the global scope:

Create a block rule for all scripts (* * script block):

If you want the approach of block 1st-party script for good, you will want to persist the new block rule:

At this poin, all 1st-party scripts are blocked everywhere. On the site where you created the rule:

And all other sites: