How to Access REmotely to a linux laptop

[kokotx1981]

Hi everybody and thanks in advance!
First of all, sorry if this post shouldn't be here, but I didn't know were it would fit better.

I have a laptop running linux and a desktop computer. Does anyboy know how could I remotely open mozilla in the laptop from the desktop computer?
I am thinking of two ways:
- Is there a way to do it through the serial port, I tried opening the executable mozilla from an hyperterminal session but it won't work. What am I doing wrong?
- Both computers have two ethernet ports with different IPs but all of them in different networks. Is there a way of accessing the laptop through these ethernet connections using switches or would I need a router?

Which would be the best way to proceed?
Could anybody explain me how would both solutions work?
Thank you very much!

[Dapper Dan]

If they are on separate networks you could do it by forwarding X over ssh. This isn't the most practical solution and is slow, but it can be done. Assuming you can now ssh from the PC to the laptop without problems, open a terminal on the PC and go for example:

ssh -Y username@laptop's_ip_here mozilla

Or:

ssh -X username@laptop's_ip_here mozilla

You might have to edit your /etc/ssh/sshd_config on the laptop so it will forward X. Some distros have this disabled by default. Look for:

X11Forwarding no

and change to:

X11Forwarding yes

If it were me though, and this is something I needed to do on a regular basis, I'd use VNC or NoMachine. Then, you could access the laptop with your PC's browser, open a terminal and enter the mozilla command.

[kokotx1981]

Thank you for the ideas Dapper!
VCN and NoMachine are definitely something I will take into account in the future, as for what I've read they are really usefull.
Anyway, in this case, I don't even need to view the browser in the PC, I just want the browser to be oppened in the laptop, but I need to do that from the PC.
I have tried stablishing a ssh session with putty and running the executable but the browser won't open.
Any ideas?