Check if your adblock is blocking enough hosts ( not ads )
With a simple UI check how much yoou blocked , the tool try to connect to most common domains for a couple of category ( Ads,Analytics,Error Tracking and Social)
Over the years there has been a lot of talk about this problem on mobile browsers, mainly on Safari (wich use WebKit , but Chromium browsers are affected). In addition to the test, there are in-depth studies and solutions