How can you setup firefox to disable connections to third party domains (piefed.social)

submitted 2 months ago by pie@piefed.social to c/firefox@lemmy.ml

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To easy understand what i am saying, i will give you this example, you visit domain.com but on this page there are other things from external domains other than domain.com that firefox fetches/connects to - cdn.blabla.com; third-party.socialwebsites.com, etc. What i want, is to simply not connect to any other domain except what i typed in url bar. I understand it can break pages but i dont care.
A while ago, setting permission.default.images to 2 somehow worked and stopped loading of external content. Disabling prefetch/preconnect/predict/predictor does nothing.
p.s. i dont want to use extensions, only about config.

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[-] Lucki@feddit.org 2 points 2 months ago

uBlock in expert mode provides a similar interface. It's not able too fine tune at the same level though.

[-] thingsiplay@beehaw.org 1 points 2 months ago

I use uBlock Origin + uMatrix together. Didn't know uBlock can do that. Need to look into the expert mode more.

[-] N0x0n@lemmy.ml 2 points 2 months ago

Hey, in case you didn't find or another user is interested, here is the wiki documentation part for the different blocking modes (easy, medium, hard).

https://github.com/gorhill/uBlock/wiki/Blocking-mode

this post was submitted on 19 Nov 2025

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