Or toggle "javascript.enabled" to false in "about:config" - no
extensions required.
the assumption being that you would use, trust firefox. A
well-documented, XML-based open source kind of proxy/gateway through
which all requests are sent and received would work with any
browser.
~
I think, given the options, the suggested idea not to install
networking at all (one of the install options with Linux) wins the
prize; then:
b) an exposed "inet" user for the session should be defined with a
RAM drive as its home directory;
c) for whom -exclusively- the network card's device driver should be
installed (is here a hack to install a device driver entirely from
user space? probably, a Debian HURD kind of thing on which the basic
hook for the networking service is exposed and a user space program
would take it from there?);
d) then all access to the Internet go through a client proxy run by "inet";
e) acting as a squid-like application proxy;
e.1) parsing all text/html content coming in, first cleansing it into
well-fomed xhtml with some HTML parser, then using XPath, java
Nasshorn, the principles of the Burp Suite + wireshark + page Reader +
...;
e.1.1) sanitzing the page into alpha-offset format;