Firefox blocking Facebook Js

Question

with upgrade of Firefox to 42.0 I got some strange behavior..

I'm calling FB.init method like this:

FB.init({ 
        appId: '{$appid}',
        status: true, 
        cookie: true,
        xfbml: true,
        oauth: true
    });

But in Firefox it gets blocked, I get warning:

The resource at "https://connect.facebook.net/en_US/all.js" was blocked because tracking protection is enabled.

This is default behavior, I didn't set up any additional security or whatever..

What to do?

EDIT - after help and googling, this is a little bigger problem:

Turns out Firefox's Do Not Track and tracking protection are two separate things:

Do Not Track is enabled in Preferences/Options > Privacy > "Tell sites that I do not want to be tracked". Enabling sends the DNT header but it does not block any requests.

Tracking Protection is enabled in about:config > privacy.trackingprotection.enabled. Enabling does not send the DNT header, but does block requests based on Disconnect's blocklist. So detecting 2 isn't as easy as checking navigator.doNotTrack, because that property is only set for 1.

Solution (temporarily) - try to do FB.init, if error do some alert..

try {
        FB.init({ 
            appId: '{$appid}',
            status: true, 
            cookie: true,
            xfbml: true,
            oauth: true
        });
    }catch(err) {
        alert('Some info for the user...');
    }

Does anyone have better solution?

Answer 1

A simple google search leads to this page: https://developer.mozilla.org/en-US/Firefox/Privacy/Tracking_Protection

You should be able to deactivate that feature right where the message appears, or via about:config. It should actually be deactivated by default afaik.

Answer 2

From the client side, you can't. This is security policy Firefox. You can read about this issue in thread: https://bugzilla.mozilla.org/show_bug.cgi?id=1226498