When comparing Iridium vs AdBlocker Ultimate, the Slant community recommends AdBlocker Ultimate for most people. In the question“What are the best Chrome add-ons?” AdBlocker Ultimate is ranked 31st while Iridium is ranked 37th.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro The developer particlecore is a respected github open source programmer and he presents all the functionality for free
Keeps up with updating bugs regularly. Always comments on 'issues' on git.
Pro Lightweight youtube.com enhancer and user experience editor
It does not overwhelm you with too many options, so you do not have difficulty choosing or having to try loads of different setups to get it just right. However the most important features are there.
Pro The extensions from the chrome store is also available on firefox & waterfox
If using a script manager it is usable across a whole range of browsers. There is a free script available to be used in browser script managers like ''Tampermonkey" which includes all functions of the addon through the script injections.
Pro Completely free
Pro Best Youtube ad blocking
Pro Free and open source
Anyone can improve and audit the code.
Licensed with a gplv3 license.
Pro Supports most popular browsers
AdBlocker Ultimate works on Chrome, Mozilla Firefox, Opera, Internet Explorer, Safari and Yandex.Browser.
Pro No acceptable ads
Unlike other adblockers, AdBlocker Ultimate doesn't have any whitelisted websites, ad networks or advertising agencies.
Pro Avoids awful looping problems on Firefox one sees with Adblock Plus and uBlock
Cons
Con Iridium is currently on hold
The current build includes a bug which seems to break youtube functionality. However after a bit of searching, a solution can be found. Posted here to help others who might be debugging all their extensions for youtube not loading videos.
The solution for many seems to be to keep the autoplay function within Iridium settings ON.
Now your videos will most likely load and play again like they should.
Con Just a browser addon
It is just a browser addon so it will only work with the supported browsers and you have to install it for all browsers separately.
Con Element hiding helper has occasional hiccups.
Con Memory hog that gets worse the longer it runs
Happened with 64-Bit Firefox 62.0.3 running on Desktop PC with 64-Bit Windows 10 Pro with 8GB of RAM.
Con Slow
Like any browser extension it slows down your browser.