Firefox blocks only one element, and that's a single imgur picture that is not https
http://i.imgur.com/TAeQj.jpg
In many countries and with many ISPs, google syndication ads are blocked because Google can't guarantee that all the ads it will show are compliant with advertising regulations, which it effectively can't, because if it could, that would imply admitting to an even worse crime: since a majority of Google Ads are legally unsuitable for minors/children/small children, if Google can guarantee that all the ads are compliant with all the ad regulations towards minor children of the different age classes in all specific viewing cases, it would have to admit that it gathers personal data on minors and children, or on adults without explicit prior permission, which is a serious crime, so Google just doesn't send out much ads anymore, there haven't been any google ads on TS.com in quite a number of countries for quite some time.
Another issue is that in the EU, Google legally has to ask for prior permission of users to store cookies, and if you ignore the question or answer no, like most people do, there will be no google syndication requests, because Google can't profile you if you've not yet performed a non-encrypted google search (because google uses custom URLs to profile you in Google Services without using cookies), and they most probably just don't have any advertising customers anymore for unprofiled ads. ANY ad-funded industry runs into this problem, most print press is already gone, commercial TV is suffering heavily, the internet is just next in line, it's completely normal because there is no added value in advertising and the effect wears out ever more rapidly. If you want ads and want Google to build an information bubble around your head, just never close your browser, accept all cookies, never purge history, disable all privacy and security measures, yolo right...
And in many countries, ISPs always block Google Ads by default and replace it with their own ads, the cool thing is that Google doesn't know or acts as if they don't know that, and keeps sending invoices for hits to its customers, when the only hit is a replacement with another ad... lol like spying and eavesdropping through a keyhole and getting nailed for mailfraud instead... now wouldn't that be righteous?
The reason why all these things don't happen in chrome or internet explorer, is because those use the CA listings that microsoft pushes to your computer with every "important security update", while the open source mozilla firefox only uses the official and verifyable listings held by the CA's themselves, and requests and verifies every certificate with the official CA database every time a page is requested. Chrome just uses the locally pushed always-dated and hackable Microsoft listings, and the "Google identification", which they sell as "anti-phising", but which is effectively just falsifying official CA public key listings.
A lot is wrong in the equation, but firefox is not.
The solution is really simple: TS could rent out it's own adspace on it's own site to it's own advertisers, instead of using google spyware, and keep track of clicks itself with modules like Simple Ads, and the problem would be solved.