this post was submitted on 19 Nov 2025
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Firefox

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How can you setup firefox to disable connections to third party domains (piefed.social)
submitted 1 week 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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[–] racketlauncher831@lemmy.ml 1 points 4 days ago

This simply won't work.

domain.com sends you an HTML, which is empty. The HTML defined a <style> tag which your browser will fetch from cdn.com. Do you want to block it? Cool, no CSS for you.

It also defined a <script> tag which your browser will fetch the React library from cdn.com. Do you want to block it? Cool, no content for you.

The whole page is just one <div id="root"></div>.