Indeed. Perhaps I should've been more specific in my wording of it but I was more referring to the snake oil claims with respect to performance tweaks and to a

Indeed. Perhaps I should've been more specific in my wording of it but I was more referring to the snake oil claims with respect to performance tweaks and to a lesser extent privacy tweaks as well. A number of privacy "tweaks" will wind up breaking third party software. You're very much correct in that the option you're talking about is important for security. At the end of the day though it is still simply a cosmetic issue albeit with security consequences. I agree with what you're saying though. It is really stupid that it still defaults to not showing extensions.