Apparently uBlock hasn't been maintained as consistently as uBlock Origin (presumably because uBlock Origin is the original project led by the original developer).
Thanks! I'm not a user of either add-on, and wasn't aware of the history.
@switchingsocial @fitheach In addition development for ublock (not-origin) has stopped a long time until last year it has been aquired by the parent company of adblock who are since distributing software with a completly different codebase than ublock/ublock origin like uBlock-Mac under the branding of ublock:
@switchingsocial @fitheach See also this thread between the CEO of Adblock and the creator and maintainer of ublock origin: