I tried this, and it didn't even get close.

Whenever I do the right-click glitch on btd 1, it makes it so I can't tab onto anything until I open a link on the page. I found that I have to click on the nk games logo and open a new tab in my browser before it lets me tab between things again.

It might actually work. I have to do some more testing, bug I was starting to get the same bug in 2. I figured out how to work around it. I will take a look and let you know.

It turns out that it changing which frame was being selected on screen. So after right clicking, anytime I would hit tab, it would tab through the options in Firefox. All I had to do to fix it was to click outside the game and then back inside the game.