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No, MV3 really isn’t more secure. MV3 still allows extensions to inspect your requests — it just doesn’t allow extensions to block them.

It’s almost comical how weak the security/privacy argument for MV3 is. Chrome could have developed a sandboxed web request inspection framework to prevent data exfiltration, but they didn’t even try. Instead they nerfed ad blockers without adding any security.

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I remember that another comical argument was performance. Supposedly, having extensions run in the background all the time is bad. So it's better to constantly, completely re-initialize them whenever an event wakes them up.

From https://github.com/uBlockOrigin/uBOL-home/wiki/Frequently-as...

>Keep in mind that uBO's own JavaScript-based network filtering engine has been measured to be faster than a well-known Rust-based filtering engine (though the measured difference back then was low single-digit µs, not something that will ever be perceivable by a end user).

Plus Google first entered the browser game with a toolbar for Internet Explorer that's main featured was it blocked popup ads.

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