The extension does not work on mobile devices. Therefore, only two licenses are needed for desktop and laptop. That's $5 a month or $45 a year. I think it's quite inexpensive.

Try to use it for a few days and customize for yourself. You will feel how your work becomes less tiresome and more productive. I myself use the extension every day. Not because it's mine. I am quite a pragmatic person. But because with it I am much more comfortable doing work in the browser. And the extension will pay for these costs in a couple of days of use.