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    I’m a happy user of both add-ons too. uBlock for blocking visual elements, uMatrix for blocking resources.

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      @cks, I’m impressed you took the time to answer my question with an in-depth blog post. Thanks a lot!

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        I’m trying to figure out what I would gain adding uMatrix to my setup. I Use Multi-Account Containers as well as Temporary Containers, Facebook/Google/Twitter/Reddit Containers, so I get all the cookies I want placed where I want, and for all other cookies, they get deleted right after I close the tab (thanks to Temporary Containers), and it does it by itself, contrary to uMatrix, so I think I wouldn’t gain much by using uMatrix except a bit fewer cookies for the sites I trust.

        Does anybody see a fault in my thinking?

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          It’s not just cookies but also blocking assets from remote hosts. For example, you can block css, iframes, images and scripts from ever being loaded from those hosts. That means tracking pixels, referer leaking and browser fingerprinting (which may defeat your container setup) will all be a whole lot less effective against you. Also many sites are much faster if you don’t load craptons of JavaScript.

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            Good points. I might give it a shot.

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          Do you also run NoScript, or is that functionality covered by uBlock Origin?

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            It can be covered by uMatrix, either globally, 1st party, or individual host level.

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              I don’t use NoScript; I used to, but for various reasons replaced it with uMatrix (which I now prefer). uBlock Origin can also block Javascript if you want it to but with less fine-grained control than uMatrix gives you. My opinion is that people who just want to block (most) Javascript and who already use uBlock Origin should probably use it for that, because it’s simpler than uMatrix. I use uMatrix because I want to block things besides Javascript (especially cookies), and I like the fine-grained control.

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              Is uMatrix really worth it over just using uBlock Origin’s medium or hard mode?

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                The one clear area that uBlock Origin’s medium and hard modes don’t seem to cover is cookies (for successful requests). You can clean them up after the fact with Cookie AutoDelete, but they’ll still be sent back to sites you visit before you close things down (or manually delete them).

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                  Good to know. Thank you very much.

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                I’m a past uMatrix user who switched to NoScript (though I’ve always kept uBlock Origin). The reason is that configuring uMatrix, even after years of experience, started to feel like minor configuration hell every time we see a new site. To illustrate, my friend still uses uMatrix and often their replies to my links are “Hang on – gotta play Whack-A-Script”, referring to configuring uMatrix for this new site so that it would display properly.

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                  I play this dance, and it’s still a worthy tradeoff for me. Site I visit frequently are already configured. New sites usually take one or two reconfigurations. If a random news site takes more than four tries to get working, it’s probably full of unnecessary tracking bloat and better to not run their javascript regardless.

                  It’s even more worthwhile on Firefox for Android, where blocking unnecessary scripts saves battery life.

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                    You’re far more patient than I am – “more than one try” is where I give up on the site. With NoScript it scarcely ever takes more than one try.