Some people use Tor within Firefox via a SOCKS proxy. This might defeat the protection given by Tor.

Right which is why the Tor FAQ says using a browser besides Tor Browser is dangerous and not recommended: https://support.torproject.org/tbb/tbb-9/

It's like how when you're baking a cake, the easiest way to do it is to buy a cake mix and follow the directions on the back. Yes, maybe you can make a tastier cake by changing the directions or using better ingredients, but you also introduced the possibility of the cake exploding. Particularly with anonymity, the trick is to do what everyone else who wants to be anonymous is doing.

...what ingredients are you putting in your cakes?

Flour?

https://daisyflour.com/flour-explosions/

Lmao

Tor is banned in countries where you are most likely to get in trouble for your online activities like China, or more recently, Russia.

Tor supports many kinds of bridges to serve as unlisted "inproxies" to enter the Tor network in an environment that blocks Tor.