The definition as “involuntary celibate” is mostly used by the community whence the word comes… 4channers. Everywhere else, it has come to refer to the ideology of those who came up with it. Basically, misogynists who blame society, and particularly feminism for allegedly creating a world where it’s harder for them to get laid, and harder still to get a subservient housewife.
I installed Palemoon because it’s more independent from Firefox, having forked longer ago, but what I’m really looking forward to is for a usable browser to come from the Servo project.