If you have a site using a SSL Certificate (https://), and when accessing it shows message 'Content not safe' and https:// text is strikethrough, it might be a googlefonts issue.
What shall I do?
Localize the googlefonts line in your source code:
<link href='http://fonts.googleapis.com/css?family=Michroma' rel='stylesheet' type='text/css'>
Then, simply remove 'http:// from the line, so it looks as shown:
<link href='//fonts.googleapis.com/css?family=Michroma' rel='stylesheet' type='text/css'>
And you are ready, your site will now work again!