But why would any browser accept access to those metadata so freely? I get that programming languages can find out about the environment they are operating in, but why would a browser agree to something like reading installed fonts or extensions without asking the user first? I understand why Chrome does this, but all of the mayor ones and even Firefox?
Because the data used in browser fingerprinting is also used to render pages. Example: a site needs to know the size of browser window to properly fit all design elements.
But why would any browser accept access to those metadata so freely? I get that programming languages can find out about the environment they are operating in, but why would a browser agree to something like reading installed fonts or extensions without asking the user first? I understand why Chrome does this, but all of the mayor ones and even Firefox?
Because the data used in browser fingerprinting is also used to render pages. Example: a site needs to know the size of browser window to properly fit all design elements.