Takes way too long on startup. Adds at least 5 seconds when launching browser, even if ublock is disabled for that site.

ブロック解除＆除外したサイトであっても、必ず毎回ブロック解除しますか？と表示されてかなりウザいのでアンインストールした。
何でこんなのが高評価なんだ？

ublock got REALLY slow at launch since 120, preventing any website to load

自分には合わなかった

無駄なブロックが多くて使いにくい

工具列圖示變成出不來或亂碼

1.13.8 - due to FX web extension change. Updates are OFF. Then today for no reason, this addon stopped BUTTONs showing on multitude of website e.g. vitalsource.com. Took me 2hrs to troubleshoot. Who has 2hrs to spend because and addon does something funky on you. It was controlling hardware acceleration somehow...

Starting to become obsolete. Popular and progressive websites are getting smarter and their ad spaces are nullifying uBlock's element blocker. You can zap countless times and the same add will reappear on every refresh. :(

Had no problems since months with uBlock origin, great Addon. But since 3-4 days and version 1.16.10 it slows down my firefox completely! CPU use with 50-70 %. Everthing freezes. Youtube sites are not longer usable. I had to deactivate the Addon. And I can see, I am not the only one who has these problems. No reaction here from the authors! I use firefox ESR 52.9.0 (32-Bit) on Ubuntu Studio / Xfce.
Also version 1.16.12 does not solve the thing. So, please fix these problems fast! I need my adblocker. ;) Thanks!

P.S. It was also not possible to update the filters. I tried several times, but no reaction, just "turning circles" symbols.

Blocks more than just ads. For example: on https://www.gls-info.nl it blocks the parcel information. Very annoying as you can't rely on what's shown on a page is "correct and complete"...

Since this automatically?? appeared on my computer where Adblock was, I am unable to connect to certain areas of Meetup.com. Why and how can I fix this?

перестал блокировать говно от Яндекс Директа уже с год, так и не исправился

Difficult to use. Even if an important element on a page is blocked, I can't find any easy way to stop blocking. Should I construct my whitelist? What's the syntax?

Does a great job in keeping things clean. Unfortunately I had to uninstall it because on Firefox v59x, it kept opening the logger in the sidebar whenever I opened the browser. It just got really annoying and I couldn't find the toggle to turn it off. I switched back to adblock+ but If someone could point out my goof, I would happily reinstall.