FunnelFlux uses Action Link URLs to track users activities. These are URLs belonging to FunnelFlux and produced so-called redirect-based tracking
Reliance on "pixels" alone can cause issues, as some browsers may block pixel scripts due to cross-domain issues. However, with FunnelFlux our tracking works fine with Safari, Chrome, Firefox and all of the major browsers as FunnelFlux creates a cookie on the same domain origin, which lessens the change of getting blocked.
On the other hand, you may use our "no-redirect" feature, which will require placing our javascript tracking script into your landing pages. When using this method you still need to use Action Links for connecting to other nodes.