If you spent a lot of time and it remains VERY less than the old version 2.9. It does not even show what it says block! It's sad an extension that one day was the best and with only 1 update it became the worst of all existing!

As of TODAY it continues without displaying what has been blocked! This new version does not have even 0.01% of what existed in the old version! In other words, this version is absolutely useless compared to other Adblocks in the market like uBlock, uBlock Origin, and any other existing one is better TODAY than Adblock Plus. I do not understand how you are not ashamed to have been the Best in the World and TODAY to occupy the WORST Position in the world! The only explanation I see for this is that the Company has sold itself for financial interests, which is a shame in the same way!

Missing import/export functionality (present in older versions!)! Copying and pasting rules exported from older version into text-box areas is counter-intuitive (some of elements like prefixes and suffixes must be manually removed!)! A separate text-box area for "Element Hiding Rules" is missing (it is joined/merged with "Custom Filter Rules" now).
It lets through far too many advertisements and "Adblock Warning and blocking" screens (even with "Adblock Warning Removal List" and "ABP filters" added and enabled) - so it doesn't really do what it is supposed to do!
Shame on you, Adblock Plus!
Edit:
I have abandoned you after many years together in favour of your rival uBlock Origin - their add-on is far more useful.

Neuer Google Datenlieferant, Vorsicht
New Google data provider, caution

DOES NOT WORK! This still lets ads through, if the ad companies pay them to whitelist their ads. This is not an adblocker and should not be called one, since it can't even do the 1 thing it is supposed to do.

Slows down your network/browser speed after using it. Its a system hog.

На ютубе появилась реклама, при снятой галке с разрешенной рекламой.
Реклама появилась даже после обновления страницы, 2 раза

В своём нынешнем состоянии Adblock Plus практически не работает! Настроил обновлённый плагин таким образом, что бы, как и раньше, не видеть рекламы НИГДЕ, и что же? На веб-страницах и сайтах ТЕПЕРЬ, после какого то из прошлых обновлений Adblock Plus (а возможно самого Firefox), реклама (любая) не блокируется абсолютно, а на Ютубе блокируется только у небольшого количества видеороликов! Поэтому - увы - ставлю только одну звезду, хотя раньше, на протяжении нескольких лет, выставлял всегда 5 звёзд. :-(
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In the present status Adblock Plus practically does not work! Configured the updated plug-in in such a way that, as before, not to see the advertizing ANYWHERE, and that? On web pages and the websites NOW, after some of last updates of Adblock Plus (and perhaps Firefox), advertizing (any) is not blocked absolutely, and on YouTube is blocked only at a small amount of videos! Therefore - alas - I put only one star though earlier, for several years, exposed always 5 stars.: - (
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¡En el estado Adblock Plus actual no trabaja prácticamente! ¿Ha ajustado renovado плагин así que, cómo antes, no ver la publicidad EN NINGUNA PARTE y que? En las páginas web y los sitios AHORA, después de que esto de las renovaciones Adblock Plus pasadas (¡y es posible más Firefox), la publicidad (cualquiera) no es bloqueado absolutamente, y en Yutube es bloqueado solamente cerca de la cantidad pequeña de los videorodillos! Por eso - ay - pongo solamente una estrella, aunque antes, a lo largo de algunos años, sacaba siempre 5 estrellas.: - (
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在目前情况下 Adblock Plus 几乎不工作！ 因此，设立了一个更新的插件会和以前一样，不能看到广告的地方，怎样？ 现在的网页和站点的一切之后的升级是从过去的 Adblock Plus （并且可能最 Firefox ）、广告（任何）绝对不会锁定，并锁定在 youtube 的视频只有一小部分！ 因此，我仅--唉--一个明星，而过去几年，总是曝光 5 颗星。 -（
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Im jetzigem Zustand Adblock Plus arbeitet tatsächlich nicht! Hat das würde erneuerte Plug-In so dass, wie auch früher, gestimmt, die Werbung NIRGENDS, und was zu sehen? Auf den Web-Seiten und den Webseiten JETZT nicht, nach welchem jene der vorigen Erneuerungen Adblock Plus nicht gesperrt wird (und es ist am meisten Firefox möglich), die Werbung (jede) absolut, und auf Jutube wird nur bei der kleinen Anzahl der Videowerbefilme gesperrt! Deshalb - leider - stelle ich nur einen Stern, obwohl früher, während einiger Jahre, immer 5 Sterne ausstellte.: - (
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Dans l'état actuel Adblock Plus ne travaille pas pratiquement! A orienté le plug-in renouvelé de manière que, comme plus tôt, ne pas voir la publicité NULLE PART, et que ? Sur les pages Web et les sites MAINTENANT, après quel cela des rénovations passées Adblock Plus (et il est possible le plus Firefox), la publicité (chacune) ne se bloque pas absolument, et sur Jutoube se bloque seulement près d'une petite quantité de vidéoroulettes! C'est pourquoi - hélas - je mets seulement une étoile, bien que plus tôt, à la longueur de quelques ans, expose toujours 5 étoiles. : - (

Много чего сегодня перестало нормально работать - яндекс.карты, youtube и т.д. Так что теперь еще один повод свалить с нечистоплотного Adblock - со многих сервисов (Яндекс и т.п.) Adblock стал брать деньги, чтобы не скрывать там рекламу.

'Acceptable Ads' has lost this ad-blocker its integrity. uBlock Origin is a much faster and better ad blocker. Read "There are no acceptable ads" by FiveFilters for more.

Works only on 20% Adds

not blocking the adds, also browser performance impacted

It took me a few days of testing on different networks but it is now clear that it slows down the loading of many pages, especially on duckduckgo.com. It makes it look bad.

Adblock plus blockiert, aber es funtktioniert bei vielen Websits nicht, ihn zu deaktivieren. Das nervt inzwischen so sehr, daß ich dieses Add-on leider entfernen werde.
= Adblock plus works, but I can't manage do deactvate it on certain websites. This has been annoying me so much, that I'll deinstall adblock plus.