When I fill forms sometimes I see brief Internet activity. Is it related to RoboForm?
Yes. RoboForm has an auto-updater feature built-in. It checks our web site for new RoboForm versions from time to time and when it sees a new version that warrants updating, it will pop up a dialog that will offer to upgrade to the new version. You can ask RoboForm to check for new version by selecting RoboForm -> Help -> New Version Check.