Content script: Eruda injection + console bridge

app/src/main/assets/devconsole/eruda-loader.js

@@ -0,0 +1,71 @@
+/**
+ * Nova Dev Console — content script.
+ * 1) Injects Eruda (bundled copy preferred, CDN fallback).
+ * 2) Bridges console.log / uncaught errors to the native app over
+ *    GeckoView native messaging ("browser" native app).
+ */
+(function () {
+  "use strict";
+
+  // ---------- 1. Inject Eruda ----------
+  if (!window.__novaErudaInjected) {
+    window.__novaErudaInjected = true;
+    var CDN = "https://cdn.jsdelivr.net/npm/eruda/eruda.min.js";
+    var tryInject = function (src, fallback) {
+      var s = document.createElement("script");
+      s.src = src;
+      s.onload = function () {
+        if (window.eruda && typeof eruda.init === "function") eruda.init();
+      };
+      s.onerror = function () {
+        if (fallback) tryInject(fallback, null);
+      };
+      (document.head || document.documentElement).appendChild(s);
+    };
+    try {
+      tryInject(browser.runtime.getURL("eruda.min.js"), CDN);
+    } catch (e) {
+      tryInject(CDN, null);
+    }
+  }
+
+  // ---------- 2. Console bridge ----------
+  var send = function (payload) {
+    try {
+      browser.runtime.sendNativeMessage("browser", {
+        type: "console-log",
+        payload: payload,
+      });
+    } catch (e) {
+      // Privileged API unavailable (e.g. extension running outside the host) — ignore.
+    }
+  };
+
+  var stringify = function (args) {
+    return Array.prototype.map
+      .call(args, function (a) {
+        try {
+          return typeof a === "string" ? a : JSON.stringify(a);
+        } catch (err) {
+          return "[unprintable]";
+        }
+      })
+      .join(" ");
+  };
+
+  var origLog = console.log.bind(console);
+  console.log = function () {
+    origLog.apply(null, arguments);
+    send(stringify(arguments));
+  };
+
+  var origError = console.error.bind(console);
+  console.error = function () {
+    origError.apply(null, arguments);
+    send("[error] " + stringify(arguments));
+  };
+
+  window.addEventListener("error", function (ev) {
+    send("ERROR: " + ev.message + " @" + ev.filename + ":" + ev.lineno);
+  });
+})();