I have a few laptops I use for testing purposes, I connect them all to it and run netstress between them http://nutsaboutnets.com/archives/netstress/ To be fair I've not needed to load test my stuff in a long time but it worked last time I tried it. Source: over 2 years ago

Most web browsers have a quick proxy switcher extension and I recommend you use that if you do tunnel your traffic over ssh. My personal favorite is FoxyProxy. A couple things to note is if your using socks5 with a browser, check the box proxy DNS over socks5. If you use firefox go to about:config, accept the warning. Type " network.proxy.socks_remote_dns" and set this option to TRUE to prevent firefox from... Source: over 1 year ago

On an individual level, proxy rotation can be carried out manually. For instance, a user can manually configure the proxy settings in a browser. Proxy managers such as FoxyProxy can be of great help in setting up and easily changing proxies. - Source: dev.to / about 2 years ago

Consider using the FoxyProxy browser extension. You won't need to use proxychains command to start firefox every time, can setup multiple proxy settings (like for Burpsuit, ZAP, TOR, etc...) and change between then with a simple click. Https://getfoxyproxy.org/. Source: almost 3 years ago