URL blocker addon that does not comprimise anonymity?

So, when I am working on my laptop I somtimes find myself reflexively typing in reddit or fivethirtyeight into the url box and distracting myself.

This happens often enough that it has a measurable impact on my productivy, so rather then spend mental resources constatly refocussing myself, is there a way to block my tor browser from accessing reddit and other potentialy distracting websites in a way that does not comprimise my anonymity?

I do remember reading that addons are fingerprints that can potentially used identify distinct users, which defeats the whole perpuse of using tor.

Any addon, script, or workaround is acceptible (as long as it does not break annonmytity), even if its a pain in the ass to set up (well, as long as it takes less then an hour to set up) because it will save a bunch of time and mental willpower throughout my workday.

I run the latest version of tails on a laptop.

Thanks in advance!