height/width calculations fail on framesets

[pjvandehaar]

Eg, http://www.quackit.com/html/templates/frames/frames_example_1.html.

document.documentElement.scrollHeight, etc are all window.innerHeight.

[pjvandehaar]

Oh, window.scrollTo doesn't work on a frameset. Better option:

if(document.querySelectorAll('frameset').length>0) {
  alert('Sorry, this page is a frameset, which is not supported');
}

[mrcoles]

I’m leaving out frameset support for now. You can checkout some workarounds in #58

[pjvandehaar]

That seems like a good choice. I still think it'd be good to let users know what's going on when the extension fails on a frameset (as per #22 (comment)), but you're free to do whatever you like.