Default ruleset at installation

For reference, this is the default ruleset when you first install uMatrix:

https-strict: behind-the-scene false
matrix-off: about-scheme true
matrix-off: behind-the-scene true
matrix-off: chrome-extension-scheme true
matrix-off: chrome-scheme true
matrix-off: localhost true
matrix-off: moz-extension-scheme true
matrix-off: opera-scheme true
matrix-off: wyciwyg-scheme true
referrer-spoof: behind-the-scene false
* * * block
* * css allow
* * image allow
* * frame block
* 1st-party * allow
* 1st-party frame allow

The rule matrix-off: wyciwyg-scheme true was added in version 1.1.6. If you are using Firefox and installed uMatrix before version 1.1.6, I strongly suggest you add this rule manually.

Some of the rules above are important to ensure proper operation of uMatrix and of your browser. Remove them at your own risk.