Is there something particular about your mom I should take away here? Or moms in general? Or women? Or older people?

My mom, like yours, would have no use for dev tools -- because she's just not interested. And neither would my brother, but my grandma would have loved learning about this stuff if she had lived long enough, and my kids have discovered this "secret hacker mode" all on their own and are delighted.

Chill out. My mom is the most common non-technical person I deal with. No need or reason to assume sexism, ageism, motherism, or any other isms. The only take away from my comment should have been "Hey, non technical people don't need developer extensions".

Yeah, but you will need it when your mom calls you asking for help with some broken website she is trying to use :)

Really? Do you commonly debug random websites for your mom?

Yes, I do that more often than not. Specially during that time of the year when you need to do the tax declaration and use the utterly broken government websites. One common problem that I have to fix is that the Brazilian government likes to issue their own SSL certificates which are not accepted by any browser, therefore I keep the requests tab open and look for any Ajax requests that was blocked due to SSL errors.