I don't even bother installing apps anymore, I don't have time to research whether or not they are going to abuse my privacy or have some horrendous TOS. I got my core 10 apps and haven't bought a new one in a year.
I am very, very sparing about installing apps. However, I'm even MORE cautious about browsing to websites, unless I can disable all client-side scripting.
At least I can firewall apps to mitigate any abuse they may engage in. That's much harder to do with websites.
just use Umatrix - https://github.com/gorhill/uMatrix
you can get the add-on for Firefox mobile also. It can be a hassle for the lazy user, but the addon will provide visibility into scripts, cookies and services used by websites.
Most scripts are blocked by default which dramatically improves page load times and privacy.