Network HOSTS filtering file -

[tinypoodle]

VSZ as provided by current busybox top is not of high relevance. IMHO unfortunately busybox does no longer show RSS as it used to.
Personally I have a preference for using htop.

Constant CPU usage of opera while supposed to be idle has been observed by many users, including myself. Disabling plugins, javascript and animated images might lessen that to a certain degree.