I tried this: https://steamcommunity.com/discussions/forum/0/1640927348821879594/?ctp=2#c3761102779894870752

Make a new text file and paste in the code (change the "D:\Games\Steam" path to your own one for the "Steam" folder). Save it as "start-mini.cmd" and double-click the file to open it. Takes a little longer to launch steam but seems to get rid of the webhelper altogether. Don't know how the code works myself exactly though.