Anyways, I just typed my password to lastpass so I should be fine. The scan did not show anything either.
Thanks for the help though.
It should also NOT be able to upload files from your harddrive (e.g. lastpass database file).
Generally such 'mining malware' does not steal any passwords/sensitive information. They just 'steal' computational power.
This does NOT mean that a mining malware which also does steal sensitive information doesn't exist.. it is just not that common.
Remove the extension. I hope you already have done this.
To be on the safe side, you might check your system for malware.
And you should definitely be more cautios when installing browser add-ons (or any other software).