I believe installed extensions are directly query-able through javascript or html5
The requirement for this is that those extensions need to directly interact with - and respond to - page elements.
Security add-ins are a “black hole” in that the vast majority of them only block, they don’t interact. There is absolutely no way for a website to tell which ad-blocker is installed from purely the ad-blocking component itself. Provided the add-on is constructed properly, it should never respond to any code either on the client-side or server-side, it should only block the browser from not even requesting certain assets in the first place. In fact, a good adblocker should be indistinguishable from a failure of DNS in providing the IP address of the ad server.
The list above is the vast majority of my add-ins. I don’t use any which are sufficiently duplicated in the browser or which are not required for enhanced security.
I am not one of those people with multiple dozens of add-ins.
You say you aren’t one of those people but i genuinely dont believe most of those extensions are needed if youre using hardened Firefox (LibreWolf/IronFox/Mullvad Browser/Tor)
https://www.privacyguides.org/en/browser-extensions/
Please give this article a read
Notable section from the Wikipedia article linked there as “stand out”:
I’m not well versed on it, but I believe installed extensions are directly query-able through javascript or html5 on sites loaded by the browser.
The requirement for this is that those extensions need to directly interact with - and respond to - page elements.
Security add-ins are a “black hole” in that the vast majority of them only block, they don’t interact. There is absolutely no way for a website to tell which ad-blocker is installed from purely the ad-blocking component itself. Provided the add-on is constructed properly, it should never respond to any code either on the client-side or server-side, it should only block the browser from not even requesting certain assets in the first place. In fact, a good adblocker should be indistinguishable from a failure of DNS in providing the IP address of the ad server.
Preaching to the choir.
The list above is the vast majority of my add-ins. I don’t use any which are sufficiently duplicated in the browser or which are not required for enhanced security.
I am not one of those people with multiple dozens of add-ins.
You say you aren’t one of those people but i genuinely dont believe most of those extensions are needed if youre using hardened Firefox (LibreWolf/IronFox/Mullvad Browser/Tor)