AdBlock not working

[harm_less]

I use this one
https://addons.mozilla.org/en-US/firefox...ck-origin/

much better imho

Tried that with same result "Installation aborted because the add-on appears to be corrupt."

I've current got ESET doing a virus scan of my lappy and plan to do a full restart once that is complete. Something lurking on my computer by the looks as too many random issues popping up this morning.