If survey have token and register is activated, allow admin user to enable new registered participants to be redirect to the survey with the new token after registering.
Survey participant information
With or without tokens : some way to get information of participants
registerQuick findUserAgentInfo Get participant browser information in your survey, use it for quota, fill questions. No javascript solution.
fixMaxStep for LimeSurvey question index Fix question index for token answer persistence survey. Get the complete index when user come back to the survey.