
I don’t know if this is possible in your circumstances, but when I wanted to hide my traffic and get around censors I ran cmder off a usb to make a reverse ssh tunnel to a cheap VPS then used a firefox extension that dynamically routes traffic through the tunnel proxy based on url.
In all honesty though the consequences of being caught doing that are probably worse than looking at porn at work since it looks way more nefarious, and isn’t really possible to play off as an innocent mistake.
It sounds much cooler than it is. Cmder is a portable terminal emulator that handily has ssh installed, which lets you log in to a remote shell and also for some reason has a feature that lets you map ports on the local machine to ports on the remote machine (a proxy).The Firefox extension is just a proxy switcher from the addons site. It really just boils down to one command:
ssh -D 8080 remote.host
Then you have a SOCKS proxy at localhost:8080 to point Firefox at.
I will say that I literally explained what I was doing to supervisors and coworkers and never got in trouble but I’ve worked at some pretty lax employers.