We have noticed that customers are reluctant to download and install exes. It will be much more safer for the end-user to add as extension for Chrome and Edge
Building extensions for Chrome and Edge would not give us full desktop control. I would recommend using the support session, as the support session is a one time run client and is not installed on the guest machine. https://docs.connectwise.com/ConnectWise_Control_Documentation/Get_started/Remote_support_guide
I would also add that if you have a lot of customers pushing back on installing access agents, you should look at the SOS deployer extension. This extension will allow you to put a shortcut on the customer's desktop that will allow them to initiate a session when needed.
Please let us know if this is helpful, or if you have any additional questions.
Customer support service by UserEcho