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Thanks Alex!! Were you able to get the state saving working without Chrome API Calls?

didn't use any specific chrome API calls. By default, if you go to a new page, the script resets back to "hide resteems". If you do want it to save the button state (at least up to the point that you completely refresh the page), all you would have to do is remove the line: isHiding = false; from line 26 of the script!