AdGuard for Safari 4+

Clean, simple, and easy to understand. I use on my Mac as well as my iOS devices. Great Apple citizen. Recent updates have made this much easier to use via the built in system controls. Also a big handy feature for me is the ability to quickly, permanently block elements on a webpage just by selecting them, great for navigating poorly designed websites with elements that cover others especially on mobile. However 4 out of 5 times when a website won't work or load it's because this is blocking some linked script or tracking redirect, which is sometimes annoying, especially when you have to do it several times every time such a link is clicked, but the app is just doing its job of blocking sketchy connections that I don't want and that's more a fault of the web at large.

This app appears to do a great job and what it sets out to do, but there is an annoying bug that renders this quite frustrating on a fresh boot: when this app is set to open at login, it does NOT honor the "hide" setting checkbox under System Preferences --> Users and Groups --> Current User --> Login Items --> "hide" checkbox next to AdGuard for Safari. Normally, when the system is rebooted and this box is checked, the app can launch, but without the application window opening in front of the user. Please fix this, so that the app can launch at login without popping up its preferences window each time! Finally, as a feature request, please support Catalina auto dark mode, and please allow for iCloud-based settings syncing... thanks!

After upgrading to Mojave, I found Safari has completely changed its mechanism of extensions. All of my ad block plug-ins now only function in very limited manners (no filter setting, no element inspections etc.).
And I feel particularly annoyed -- I browse Chinese websites frequently, yet almost all ad blockers would never succeed in removing ads in foreign languages unless you set up filters manually. Yet as I said before, all most all ad blockers under Mojave are too succinct to offer such advanced features.
Thankfully, I finally found this lovely, amazing, elegant, useful, powerful AdGuard. The pre-installed language-specific filer lists are totally incredible.
To Mojave users, if you're reading this review, pls stop searching for other ad blockers. AdGuard is THE BEST!