It is able to block all ads, trackers and annoyances that users encounter. Including all YouTube ads.
Don't disagree that there are some limitations with more contemporary ad blocking approaches but they do the job for most users needs. These approaches will likely continue to evolve and include necessary capabilities to do more in the future.
I just went to give it a try, as the website copy says "Free from the App Store" and "optional Pro subscription", however, I was disappointed that the pro subscription is required to give it a try. It just says "Magic Lasso is disabled" and requires me to start a 1 month free trial. Really feels bait-and-switch.
I uninstalled it without subscribing, as my personal feeling on it is if you don't believe in the product that you have to, frankly, mislead me before installing it, it's not worth trying. I'd feel very different if the website was clear on the pro subscription requirement.
If it's not a scam it at least works hard to appear as a scam.
Mozilla maintains a list of which keys are compatible across which browsers as well [2]
[1] https://developer.apple.com/documentation/safariservices/saf...
[2] https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/Web...
https://github.com/w3c/webextensions/issues/298#issuecomment...