Firefox didnt like this page at all and we couldnt get consistent readings to run tests, on every refresh the browser would simply not respond or crash.

In general weve picked sites that are not too fast to load all content or have a sizable load time difference between showing ads and blocking ads.

CNN.com Many articles and reports have highlighted news sites as one of the worst types for advertisements, so a major provider like this should be a good starting point.

CNN.com doesnt seem too bad, we noticed 4 ads on the home page and promoted stories from outbrain inside the articles.

This is a content rich site and that could affect the time differences between ads and no ads.

Ghostery was also best in memory usage while AdBlock Plus was by far the biggest CPU hog.

The Firefox CNN load times were quite similar although Block Origin managed a small advantage over AdBlock, which had a small lead over the others.

PCAdvisor.co.uk PC Advisor is the UK branch of the American online PCWorld magazine.

We originally intended to test pcworld.com but when it was found that pcadvisor.co.uk has far more and far bigger ads which can take up an astonishing 34 of the browser window, we switched to PC Advisor.

There was a reasonable time difference between the fastest (Block Origin) and the slowest (AdBlock Plus) in Chrome.

AdBlock had CPU and memory spikes midway through the test, interestingly all the other AdBlock based addons suffered with the same problem.

Firefox didnt like this page and often displayed 2 header ads on top of each other and was often very sluggish when loading.

Things improved with an ad blocker where Block Origin was noticeably faster.

Unsurprisingly Airliners is an aviation website with information and news about aircraft.

A pop in ad periodically appears on the homepage, the search pages however, have five ads and taboola sponsored links so we tested one of those.

Ghosterys load time in Chrome was the slowest and it had issues with some on page Javascript.

AdBlock Plus was second slowest with Block Origin the fastest by half a second.

Block Origin was fastest in Firefox too, and by quite a distance.

Ghostery also suffered the same problem as it did in Chrome and got stuck on one of the pieces of Javascript.

CNET.com CNET is one of the biggest technology news and review sites around and the download.com subdomain is a huge portal for software downloads.

CNET is one of those guilty for starting off the trend of bundling adware wrappers with their software downloads.

The homepage is content rich and displays 4 ads so its debatable how much difference an ad blocker will make.

Most Chrome ad blockers were able to cut load time by more than half, with Block Origin eeking out a tiny lead over Adguard.

AdBlock and SuperBlock were both higher on memory and processor usage.

Tmz.com What makes Tmz amazing is not its entertainment news, but the sheer size and amount of content that needs to be loaded.

The homepage alone requires over 600 requests, 10MB of data transfer and over 50 third party scripts, all of which cause high CPU usage and a slow time to completely load the page.

Ad blocking shaved a massive 20 seconds off load time and Block Origin was the only one under 10 seconds.

Three blockers exceeded 100MB for memory usage while several suffered high CPU usage due to the page size, Simply Block Ads especially.

Skript Adbblock Gest