Why is my facebook pixel code not showing on some browsers?

Hi,
I need some urgent help please?
I added some facebook pixel code to a site http://electricbicycle.com.au
i added it to the child theme header and it seems to on;y appear on windows chrome?
Its not visible on any mac browsers, but you can see it on google chrome - see picture attached.
What on earth is going on?
Why, why would this NOT be showing everywhere but only on chrome?
TEBCO_FB.jpg
LVL 11
Amanda WatsonWeb DeveloperAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

David FavorLinux/LXD/WordPress/Hosting SavantCommented:
Trying installing https://developers.facebook.com/docs/facebook-pixel/pixel-helper into Chrome to debug Facebook pixel problems.

Currently the debugger shows your page contains no Facebook pixel.

If you do a View Source on the page, you'll also see there's no Facebook pixel on your page.
0
Lucas BishopClick TrackerCommented:
I see the following plugin is running on your site:
<!-- Performance optimized by W3 Total Cache. Learn more: https://www.w3-edge.com/products/

Open in new window


Have you refreshed the page cache? Could be that you're simply viewing the old version of the page.

In the plugin interface it should look something like this:
empty cache
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Amanda WatsonWeb DeveloperAuthor Commented:
That was it
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Facebook

From novice to tech pro — start learning today.