Do Firefox features like tracking protection blocks ads?

I hope you are well.
I use many browsers to check the availability and quality of the website. Whenever I use Firefox, It sometimes shows some ads and sometimes not. Actually, according to the site setting, the ads should be displayed but it just blocks it. I am not sure that who is blocking. It might be firefox itself or tracking protection feature. The space for the Ad is always preserved but ad doesn’t load.
Here is the site link: