Sorry my mistake, it was pkill, but we also tried kill with process id, and we also tried killall. Every method that I knew i tried.

Yes, I killed the parent process. Also after killing the process with firefox PID, the file equivalent to that process /proc/PID was still there. I think it could be - "likely I/O or driver related" or "stuck in a syscall waiting on some kind of I/O operation that isn’t timing out/is bugged out/can never complete".

It's not frustrating if someone starts with linux without using windows once.

crazy updates which broke normal functionality, absence of tiling window manager

I knew it was something related to kernel. Now I have some some explanation of if this happens again.

Yes, and everyone knows the blue screen of death!! It's so annoying.

Iosevka Term and Computer Modern For Articles

Thanks! i'll try it out

Sorry, it was a mistake, I fixed the post. Also I tried many other ways to kill that process. Thanks for the BUSIER tip.

there are multiple user interface option in libre office, https://books.libreoffice.org/en/WG72/WG7221-UserInterfaceVariants.html