Firefox background-image slurping error

[caseywatts]

This is a Firefox compatibility bug we can just close - I think this can be Chrome-only for and that's okay.

I discovered that in Firefox background-image ends up including "'s inside the url(), where Chrome doesn't, and I had to add two more replace's to account for that:

    var download_url = row_with_string.find('.emoji-wrapper').css('background-image');
    var cleaned_up_download_url = download_url
      .replace('url(','')
      .replace(')','')
      .replace('"','')
      .replace('"','');

[caseywatts]

and now I can delete my local copy of the code, everything useful has been shared :)