Here are some helpful suggestions to ensure that Freedom and your software development environment work properly side-by-side.
On the desktop, Freedom utilizes a local proxy to filter the content you've selected. We use this approach because it gives us a good balance of speed, flexibility (wildcard support, etc.), and privacy protection (does not require elevated permissions, and blocking is completely contained to the machine). The Freedom proxy runs on port 7769, and uses compiled regular expressions for real-time pass/no-pass decisions.
Proxy Interactions with Development Environments
The primary issue we see with local development environments is an incompatibility with local proxy. That is, a local development tool is unable to, or unhappy with running through the proxy. Generally, these issues can be resolved by enabling the tool to run through a proxy (sometimes a command flag) or by bypassing the local proxy.
Local Proxy Bypass - Windows
If you're running a development server on localhost, you can configure windows so that traffic to localhost does not go through the proxy. Enable this from Internet Settings -> LAN Settings -> Bypass proxy server for local addresses. MSDN Article.
Local Proxy Bypass - Mac
You can specify IP ranges and hostnames to exclude from the Mac proxy via Preferences -> Network -> Advance -> Proxies -> Bypass settings for these Hosts & Domains. You'll want to make sure that the address or hostname of your local server is on that list (it could be 127.0.0.1, 0.0.0.0, localhost, 192.168.1.1, etc.) This field supports wildcards for IP ranges. Apple Support Article.
Interactions with Specific Products
Some specific solutions for interactions with development tools. If you've run into an issue with Freedom and a development tool, please let us know so we can attempt to identify a solution.
It is fairly commonplace for developers to use a VPN service for traffic testing, etc. Unfortunately, Freedom cannot intercept or block VPN traffic, unless you're running in "Block Everything" mode on the Mac. This affects both system and browser extension-based VPN's.