For web access, in Firefox I've been using the "SocialFocus" add-on, that allows you to remove certain blocks in "social" websites (for example, blocking Shorts or comments in YT), put a color filter to make it "black and white", or even blocking the whole site. I had to access Facebook a couple times some months ago, and the quantity of trash you can filter with this add-on is astounding. This developer has also a YouTube specific add-on I haven't tested yet, named "UnTrap for YouTube" that has almost 200 different options for blocking very specific stuff there. Their add-ons in [0]

For Android there's an App called Revanced that let's you apply patches on certain commercial apps like YouTube or Twitter modifying their behavior, and for example block shorts. See the patches available for YouTube in [1]. I'm still pending to test it, but if you do, go to their official site [2], or even better, to their GitHub releases [3] as it seems like there are a good bunch of scammy sites using their name.

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  0: https://addons.mozilla.org/ru/firefox/user/17777732/
  1: https://revanced.app/patches?pkg=com.google.android.youtube
  2: https://revanced.app/
  3: https://github.com/ReVanced/revanced-manager/releases