ProxyHub — Per-Site Proxy Switcher Pro od Abolfazl Mirhajian

ProxyHub lets you send specific sites through a proxy instead of routing your whole browser through one.

• Per-site rules with real wildcard support (e.g. *.example.com)
• HTTP, HTTPS, SOCKS4, and SOCKS5 profiles, each with optional username/password
• Nested CDN "companion group" suggestions, so proxied pages don't break missing assets
• Optional encrypted credential vault — proxy passwords stay behind a master password instead of plain text
• Searchable rule manager with JSON import/export
• At-a-glance toolbar icon showing whether the current tab is proxied or direct

ProxyHub does not collect, transmit, or share any data. Profiles, rules, and (if used) the encrypted vault are stored only in your browser's local storage.

Source code: https://github.com/Mirhajian/ProxyHub