Long, long ago, when i first learned that i could define my own (css) defaults on my browser, my mind was blown! I can't recall if it was back in netscape navigator or early fireforx days...but learning the command path from the menu to "turn off css styles" (View -> Page Style -> No style) made me feel like some sort of superpowered being! lol :-D More seriously, it actually helped me better understand the web, html, web pages as documents "downloaded" by the browser, etc. I became a much better web dev for it - beyond feeling like i had more freedom due to software/app.!