No question is ever silly :-) I'm glad you found the instructions easy (I tired) and I can tell you that every tracker that we know of is on that list. Yes from time to time trackers will get new domains and as soon as we find out we add it ASAP. The beauty of being subscribed is you don't have to worry about it if was or was not updated - Firefox will auto update if for you. You can check any time you want to make sure it has auto updated by simply clicking up top (left hand side)

Tools > AdBlock Plus Preferences > then scroll down till you find the subscription

if you look at the date in the pic you will see its the same as todays. Now note I use a Firefox theme so your might not have a blue background.

Do I trust it - well I have it installed on my childrens computers so YES I trust.

Welcome to the drop Watermelon1 - you should introduce yourself in our intro thread (were glad your here): Introduce Yourself! If you have any questions feel free to ask