I tied to design it with security in mind and patch some reported vulnerabilities along the way but I'm sure I've missed lots of stuff.

I'm hoping some security minded readers more intelligent than me can break it so that I can fix it so that it will be safer.

The target is: https://browsergap.dosyago.com/

I know this is a big ask, so I totally understand if nobody takes it up. If you find something you want to disclose, please mail me [email protected] and I will work with you to fix it and if you want I can add your name, and report or whatever you want to the public vulnerability disclosure repo: https://github.com/dosyago/vulnerability-reports