Didn't work... Elaborating, it didn't work after adding a regex rule (maybe I should have tried harder, but I kind of quit after half a dozen tries, as the extension seems to add characters to the beginning and the ending of all inserted rules, regardless of them being necessary or not.) Even if it had worked, it'd be amazingly cumbersome to manage the rules, as, after added, they cannot be edited, just removed (there's an option to load a local text file with the rules, one per line, but then again, to edit one single rule, it requires the clicking on a purge button that removes all rules, then loading the file again...) It could simply have the rules in a textarea for free editing, like other blockers do, which would make it much easier to manage.