Network Manager

An enhanced Network tab: inspects, replays, and tampers with the active tab's HTTP traffic.

Inspect, modify, block, and replay the active tab's network traffic — like DevTools' Network tab, but you can tamper with it. An upgraded version of network manger found in chrome dev tool. **Network Manager** is a DevTools-style Network tab that doesn't stop at watching traffic — it lets you change it. It follows whichever tab you're looking at and streams that tab's HTTP requests into a side panel: a familiar filterable, color-coded list with a resizable detail pane for headers, payload, response body, and timing. But underneath, it drives the Chrome DevTools Protocol directly, which means you can also: - **Block requests** — kill a request outright, from the row menu or a saved rule. - **Rewrite requests and responses** — change a URL, method, header, status, or body before it reaches the network or before it reaches the page. - **Set live breakpoints** — pause matching requests mid-flight, edit them by hand, then continue or abort. - **Edit and replay** — take a captured request, tweak anything about it, and re-send it straight from the panel. - **Save override rules** — persistent, reusable rules matched by URL (substring or regex) and method, so the same tamper applies automatically every time. ### Why it's not just another Network panel clone Chrome's built-in `webRequest` API can only watch and block — it can't rewrite a response body. Network Manager uses `chrome.debugger` to talk to the DevTools Protocol directly, which is the only way to modify what a page actually receives. Because of that, it opens as a side panel instead of a DevTools panel — that's also the one tradeoff: you can't have DevTools open on the same tab at the same time. ### Built for Debugging flaky APIs, testing how a frontend handles error responses or malformed data, blocking a third-party script without touching a proxy, replaying a request with a tweaked header to isolate a bug — anything where you need to see traffic *and* change it, without leaving the browser. ### What it does not do It doesn't collect analytics, track browsing history, or send any data anywhere. Rules and preferences are stored locally, on-device, via `chrome.storage.local`. It only inspects the tab you're actively viewing. ## Category Developer Tools