SwitchyOmega

SwitchyOmega is a browser extension that solves a specific, practical problem: managing multiple proxy configurations and switching between them while browsing. If you run proxies or connect through different proxy servers depending on your task, manually editing browser settings each time is tedious and error-prone. SwitchyOmega automates that workflow by storing multiple proxy profiles and switching between them on demand or by rule. It's free and open-source, maintained by the community on GitHub, and available for Chrome, Chromium, and Firefox on desktop.

The core strength of SwitchyOmega is its scenario system. You create named scenarios, each storing a proxy configuration with a host, port, username, and password. Each scenario can use HTTP proxies, SOCKS4, SOCKS4a, or SOCKS5 protocols. Once you've set up your scenarios, you can switch between them by clicking the extension icon in your browser toolbar, selecting the scenario you want, and browsing immediately with that proxy active. If you run ten different proxies or rotate between proxy pools, you set them up once and never type an IP address into your browser settings again. The extension also supports direct connections without a proxy in each scenario, so you can toggle between "use proxy A," "use proxy B," and "no proxy" with one click.

Beyond manual switching, SwitchyOmega offers automatic switching rules. You can set up conditions based on domain patterns or specific URLs, then assign scenarios to each rule. For example, you might route all traffic to example.com through proxy A and everything else through proxy B. The rules engine uses PAC (Proxy Auto-Config) script compilation, which means it can handle hundreds of rules efficiently without bogging down your browser. You import rules in standard AutoProxy or Switchy formats, or write them as simple domain patterns like *.example.com. The system respects the order of your rules and applies the first matching rule, making it predictable to test and debug.

For power users, SwitchyOmega supports importing PAC scripts directly, letting you use externally maintained rule sets or write custom logic. This flexibility is valuable when you're managing proxies across teams or want to maintain rule files separately from the extension. You can also export and back up your configuration to a file, then restore it on another browser or device. Cross-device synchronization is available if you enable it, though this requires storing your settings on your browser's sync server, which means your proxy hostnames and ports are synchronized (your passwords are not stored for security reasons).

The extension's limitations are worth understanding upfront. The most significant is that browser limitations, not the extension itself, prevent per-tab or per-window proxy switching. Chrome and Firefox control proxy settings at the browser level, not the tab level, so every tab in your browser uses the same proxy. If you need different proxies for different tabs simultaneously, you'll need multiple browser profiles or a different tool. SwitchyOmega also doesn't support SOCKS5 authentication on Chrome due to a browser restriction, though Firefox has more complete SOCKS5 support. The extension cannot manage system-wide proxies outside the browser, and it has no built-in DNS filtering or IP routing table management, so it works strictly within the browser environment. On macOS, there are occasional UI rendering issues due to Chromium's rendering engine limitations on that platform, though the core proxy switching functionality remains intact.

On GitHub, the project has 22,600 stars and remains popular despite being marked as no longer actively maintained. The latest maintenance note points users to issue 2513 for the current status. This means the extension's core features work but won't receive new features or regular updates. However, because the codebase is open-source and the extension is distributed through the Chrome Web Store and Mozilla Add-ons, the community continues to fork and maintain versions. If you're considering SwitchyOmega, check the recent GitHub issues and forks to see if any community members have published updated versions or bug fixes.

The extension's architecture is modular and clean. The omega-pac module handles the profiles model and PAC compilation, omega-target manages the browser-independent logic for proxy options and applying profiles, omega-web provides the configuration UI, and environment-specific folders handle Chrome and Firefox differences. This design makes the tool reliable across browsers and relatively easy for developers to maintain or extend if needed.

Installation is straightforward. You download it from the Chrome Web Store for Chromium browsers or Mozilla Add-ons for Firefox, click install, and open the extension's options page to add your proxies. The UI is no-frills and functional. You name each scenario, fill in the proxy host and port, choose the protocol, and optionally add rules or a PAC script. The interface is usable but sparse on guidance, so you'll want to check the FAQ or GitHub wiki if you're new to PAC scripts or proxy configuration. The learning curve is shallow if you've configured proxies before and slightly steeper if you're setting up PAC scripts for the first time, though the documentation and community guides help considerably.

One thing SwitchyOmega explicitly does not do is provide proxies. It is purely a management and switching tool. You must bring your own proxies. The developers also note that untrusted proxies may inject ads or track your activity, so you should only trust proxies from sources you control or vendors you know. SwitchyOmega cannot protect you from a malicious proxy, only help you organize and switch between the proxies you've already chosen. This is an important distinction because it means your security depends entirely on the proxies you configure, not on SwitchyOmega's protection mechanisms.

For users managing proxy rotation across multiple projects or testing, the backup and restore functionality is essential. You can export your entire configuration as a JSON file, store it safely, and restore it later or on another machine. This is invaluable when you're setting up a new workstation or sharing proxy configuration across a small team. The ability to sync settings across multiple browser installations via your browser's sync account also simplifies management if you use the same browser profile on several computers.

For teams and individuals running proxy infrastructure or using proxy pools, SwitchyOmega fills a real gap. It turns proxy switching from a tedious manual process into a reliable automation layer inside your browser. The open-source nature means you can audit the code and build on it if needed. The limitations are real but predictable: you'll understand them before you install, and they're mostly browser restrictions, not design flaws. If you manage proxies and spend time switching between them, SwitchyOmega is a solid choice.