In some browsers you can disable iframes and then set them to be used on per site preferences. I know opera provides this functionality.
From Quirksmode:
Disabling iframes
- IE9: Internet Options -> Security -> Custom level (for Internet zone) -> (scroll down) -> Launching programs and files in an IFRAME -> set to Disable.
- Firefox: Go to about:config -> search for “frames” -> click on browser.frames.enabled
- Opera: Ctrl+F12 -> Advanced -> Content -> Style Options -> uncheck Enable inline frames