It seems that blocking resources not working for me

I want to test the performance of this page with loading web fonts. I added .woff to block tab but in the end-result .woff files are still loading. Not sure where I’m doing wrong

http://pages.litmus.com/webmail/31032/319342354/4a0030790a9b8e5e0f0aaa3b9454639e

Do you have a link to the test results. Substring matching only works for content blocking with the desktop browsers so if you were testing on a mobile device it won’t work (those can only block full domains).