As of today, this and all addons are currently broken for FF. DO NOT UNINSTALL! There was a thread on Reddit that some sort of update or new system Mozilla was working on was implemented but while it certainly works to block installs... it was DOA so now all addons are broken till they either fix that new bit of software or w/e it is, or remove it. There is a work-around using the config, but I would not recommend it as it would not only fix addons, but open a backdoor through your browser, directly into your system. My 5 Star rating is based on how it worked before, not currently.

edit: one of the safer and VERY temporary fixes is to go into about:debugging and using it to "Load temporary add-on" if you uninstalled, right click the add to firefox button and click save to- put it anywhere then load about:debugging > Load Temporary Add-on > click the file wherever you saved it to. in most cases, this cancels once you close your browser so you'll need to reload it again.

I like it it works but now Firefox has remove it and will not let me down it again They will not let me down load any thing !!! What is wrong ?

nao usey ainda

Süper uygulama

web browsing is a pleasure again! stops so many annoying pop-ups! feel like it's the late 90's again, makes for a very nice web experience. must have add-on!

I am very happy with AdBlocker Ultimate: it stops all kinds of ads from different websites, and it's super easy to Enable/Disable it when you want to - just click a button. I've been using the extension for more than an year now and no glitches so far! Highly recommended 5/5

Better than ever :)

Its so nice not having Ad's constantly flashing and cluttering the screen up. Ad Blocker Ultimate is quite simply the Must Have extension for anyone using FireFox

well happy saves loads of time