Access via Web interface stymied by pop-up to install client

I can't install the TeamViewer client software due to restrictions on my work Linux box but, when I am trying to remotely access a remote system, I can't get past the pop-up window that says "Download and install TeamViewer full version and then click here to connect". I tried clicking the checkbox for "Always use the Web client (not recommended)" but the pop-up window doesn't go away.
Can someone please tell me how to make this happen?