in all cases memory is reduced :)
> You can't compare directly the figures between the browsers
Still, yes, Chromium uses more memory. A good part of this is because per-process tab. Once Firefox get the same per-process tab architecture, it will be easier to compare both browsers together.
The details of the benchmark (if you want to reproduce) are in the spreadsheet linked in the caption.
https://bugzilla.mozilla.org/show_bug.cgi?id=988266 https://bugzilla.mozilla.org/show_bug.cgi?id=1001426
It's worth remembering that ABP only implemented the element-hiding feature so that things like inline text ads could be blocked, but now the popular rule lists are using a large number of broad rules to hide all kinds of elements, many of which could probably have been effectively blocked with URI-matching rules.
Additionally, it's very unfair to the ABP devs to be criticizing the performance or memory usage of ABP when the problem is really the memory usage of EasyList. Using a more restrained and targeted rule list makes the problems go away.