Can anyone explain exactly what Firefox Tracking Protection does & doesn't do? The label "tracking protection" makes me think it might block analytics tools and retargeting/remarketing cookies, but this blog post seems to suggest that it might block advertising altogether.
They just have a blacklist of sites that they block, it's not much more sophisticated than that from what I read. All of the localstorage, cookies, and other tracking across domains goes away if you filter requests like that. I'm sure they are doing more things, but they have to make sure it doesn't break a large number of sites, and if a site is broken it seems like an "all or nothing" allow/deny system, which is not ideal.
I use uMatrix and it defaults to blocking all 3rd party scripts unless they're globally trusted or have been trusted in the past. This creates lots of problems for many websites. Most new websites I visit I have to enable some 3rd party scripts, refresh, make sure there are not any critical javascript errors in the console, then I can properly use the site. Normal users cannot be expected to do this, they must have it work the first time or they will freak out.
