This will save the current quirk to the local storage, you can load it from the preset buttons above. Saving a quirk with the same name as another quirk will override it. If that quirk has no modifiers, the quirk will be deleted.
This is the condition for this quirk mod. If this condition is met, aka the regex is found within the text, the quirk mod will be applied, otherwise it will not be. For example, if the condition regex is set to /!/g, the quirk will only be applied when a "!" is found within the text.
This feature is not present in the pesterchum client. Though it's effects can be emulated using regex replaces if you know what you're doing.
Quirk Builder Quirk Builder