Sadly this single addon uses 32 GiB of virtual memory on Linux systems. This results in a completly lagging/freezing PC when just running Firefox. Got worse since I use Sophos AV which does on-access file scanning. Because I will not disable on-access scanning due to security reasons, I got to disable the addon. After using uBlock Origin for a long time I now switch back again to uMatrix as this addon does not use any extraordinary amount of space. I am running 20-30 security addons in conjunction and pinned point that NON of ALL the other ones has this behaviour. Please fix the background system of how the extension works. To see WORKING Addons see my profile.

EDIT: The issue was resolved ~1 year later. Today, I can run 1000 Tabs with uBlock and its non of an issue any longer.