When AI Leaks Tweaker’s proxy is running onDocumentation Index
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127.0.0.1:8000, your browser needs to send its requests through that address so mitmproxy can intercept and modify them. You can do this system-wide by changing your OS network settings, but that routes all traffic — including unrelated apps — through the proxy. FoxyProxy is a browser extension that gives you finer control: you point only your browser at the proxy, and you can toggle it on or off with a single click from the toolbar.
System-wide proxy vs. FoxyProxy
| Approach | What it affects | When to use it |
|---|---|---|
| OS proxy settings | All network traffic on the machine | When you need to intercept traffic from apps other than the browser |
| FoxyProxy | Browser requests only | When you only need to intercept Gemini, Copilot, or similar web traffic |
Installing FoxyProxy
- Firefox
- Chrome
Open the Firefox Add-ons page
Navigate to addons.mozilla.org and search for FoxyProxy Standard, or go directly to the FoxyProxy Standard listing.
Configuring FoxyProxy
After installing the extension, you need to add a proxy entry that points to the local mitmproxy instance.Open FoxyProxy options
Click the FoxyProxy icon in your browser toolbar, then click Options (or Manage) to open the settings page.
Set the host and port
Fill in the proxy details:
You can optionally set a Title such as
| Field | Value |
|---|---|
| Host or IP Address | 127.0.0.1 |
| Port | 8000 |
| Proxy Type | HTTP |
AI Leaks Tweaker to identify the entry in the list.Port
8000 is the default port used by the AI Leaks Tweaker start command (mitmdump -s proxy.py -p 8000). If you changed the port in the Start Command field on the Proxy tab, use that port here instead.Enabling and disabling the proxy
Once configured, you control the proxy from the FoxyProxy toolbar icon without touching the options page.Enable the proxy
Click the FoxyProxy icon in the toolbar. Select the AI Leaks Tweaker entry (or whichever title you gave the proxy). FoxyProxy will now route all browser requests through
127.0.0.1:8000.Verify the proxy is working
Make sure the AI Leaks Tweaker proxy is running (the Proxy tab should show Stop Proxy). Navigate to any HTTPS page. If the CA certificate is installed correctly, the page loads normally and the proxy log shows the intercepted requests.
Troubleshooting FoxyProxy
If HTTPS pages fail to load with a certificate error after enabling FoxyProxy, the mitmproxy CA certificate has not been installed in your browser’s or OS’s certificate store. See the CA certificate section in the proxy setup guide for instructions on installing the certificate. If pages time out or refuse to connect, confirm that:- The AI Leaks Tweaker proxy is running — check the Proxy tab in the application.
- The host and port in FoxyProxy match the start command (default
127.0.0.1and8000). - No firewall or security software is blocking connections to
127.0.0.1:8000.