[mothered]

To be fair, if you're running a VM with multiple applications on 4GB, Adblock is the least of your worries.

It actually runs the VM quite well, without any drop In performance or system Instability.

It's when the available/free Ram Is being consumed unnecessarily, with 30 tabs open and each tab consuming 50MB of Ram via AdBlock, that's of concern. I have 4GB of Ram, less hardware reserved, which constitutes to around 3.6GB of usable Ram. Less running applications and the VM, I'm left with around 1.8GB of available/free Ram. AdBlock then consumes 1.5GB (30x50MB), hence left with 300MB of memory.
That's when my system gets to a crawl.