Support

It's not possible — at least not reliably.

This button calls a piece of JavaScript which sets up the secure hash components using an AJAX call to a backend com_ajax page. Then it redirects you to the frontend page by setting window.location through JavaScript. The frontend page uses the secure hash to log you in.

Doing the latter step as a new window / tab is interpreted by the browser as a pop-up window. During my testing I found that most modern browsers would block the "popup window" by default with a very easy to miss hint. In many other cases third party extensions, like NoScript, would block the popup without any indication of what is going on. This would give the impression that the plugin is not working. Therefore I chose to open it in the same tab as this is not being blocked by browsers and browser extensions.

> It is not as though we will be using this function on a regular basis.

That was a factor I considered when making the decision. I could've made it an option but a. people would change it without reading about the caveat of doing so and b. it's used so rarely that opening in the same tab is not too annoying, while the alternative would lead to support requests I don't want to have to deal with.

> Thanks for developing this FREE plugin which for us moving to Joomla 4 will be very useful.

My pleasure :)