Hello!
- If I don’t run any code or even don’t write any code, will the kernel run?
Basically, the kernel runs when the notebook is open.
- If the above is right, then can I stop the kernel? Where?
Kernel automatically stops when you close the notebook, also you can manually shut it down using the “Running computations” dialog:
- If I can stop the kernel, how I can restart it?
If it wasn’t explicitly stopped recently – you need just to reopen the notebook to start the kernel again. Otherwise there will be a popup with the button:
- When I open the notebook in Google Chrome, the LaTeX rendered as is, but in Firefox it won’t work. Why?
Could you provide more details please? Everything seems to be fine for me (I’ve just checked on Firefox 77.0.1@macOS and 74.0@Ubuntu).