FoxyProxy: switching between proxies in two clicks

Firefox: https://addons.mozilla.org/firefox/addon/foxyproxy-standard/
Chrome / Edge / Brave: https://chromewebstore.google.com/detail/foxyproxy/gcknhkkoolaabfmlnjonogaaifnjlfnp
Price: free, open source
Protocols: HTTP, HTTPS, SOCKS4, SOCKS5

Why FoxyProxy rather than the browser's own setting

Chrome and Firefox can use a proxy, but badly: Chrome hands it over to the system proxy (so the whole machine changes at once), and Firefox only remembers one at a time.

FoxyProxy keeps a list. You move from an Orange proxy to an SFR proxy without retyping anything, and you can route some sites through the proxy and everything else direct.

Step-by-step setup

1. Add the proxy

Click the fox icon → Options → Add.

Field	What you enter
Title	a name you will recognise: `FRProxy — Orange 15001`
Proxy Type	`SOCKS5` (or `HTTP`, depending on the port)
Proxy IP / Hostname	`frproxy.com`
Port	your port
Username / Password	your panel credentials

2. Enable it

Fox icon → click the proxy's name. The icon changes colour: that is the only sign that you are actually behind the proxy, so get into the habit of looking at it.

3. Optional — send only certain sites through it

The proxy's Patterns tab: add *.vinted.fr/*. Then choose the Use enabled proxies by patterns mode in the menu. Anything that does not match goes out direct.

Strengths and limits

✅	❌
Free and open source	Only protects the browser — the rest of the PC goes out direct
Several proxies remembered, instant switching	One active proxy at a time per browser
Routing by URL pattern	Changes nothing about the browser fingerprint
Requires no administrator rights	WebRTC leaks remain possible: disable separately

The limit that really matters

FoxyProxy compartmentalises nothing. Two accounts opened in the same browser, even behind two different proxies, share the same cookies, the same localStorage, the same Canvas fingerprint. The platform links them in a single request.

Two accounts in parallel need either two separate browser profiles or an antidetect browser. FoxyProxy is excellent for one account at a time, or for testing a proxy quickly. It is not a compartmentalisation tool.

⚠️ Turn WebRTC off. Firefox: about:config → media.peerconnection.enabled → false. Without it, a page can read your real IP despite the proxy. See WebRTC and DNS leaks.