It is really good

outstanding program

There's no way to see what it has blocked. According to the developer, "a filtering log is only available in our desktop ad blocker only". Also, there is no way to whitelist only part of a website (for example, to whitelist "https://www.example.org/admin/" but filter the rest of the site normally).

good

Add-on was working great but recently it started causing both mediafire and tumblr to malfunction.

best ad-blocker i've seen so far. Does the job and so much more. Literally makes me forget ads even exist!