Proof-of-concept to fix issue regseb#26

src/background/clearcookies.js

@@ -0,0 +1,15 @@
+const removeCookies = function (details) {
+  for (let i = 0; i < details.requestHeaders.length; i++) {
+    const header = details.requestHeaders[i];
+    if ("cookie" === header.name.toLowerCase()) {
+      details.requestHeaders.splice(i, 1);
+    }
+  }
+  return { requestHeaders: details.requestHeaders };
+};
+
+browser.webRequest.onBeforeSendHeaders.addListener(
+  removeCookies,
+  { urls: ["ws://*/jsonrpc", "ws://*/jsonrpc?*"] },
+  ["blocking", "requestHeaders"],
+);

src/background/index.html

@@ -9,5 +9,6 @@
     <script src="migrate.js" type="module"></script>
     <script src="menu.js" type="module"></script>
     <script src="permissions.js" type="module"></script>
+    <script src="clearcookies.js" type="module"></script>
   </body>
 </html>

src/manifest.json

@@ -45,6 +45,8 @@
         "activeTab",
         "menus",
         "notifications",
-        "storage"
+        "storage",
+        "webRequest",
+        "webRequestBlocking"
     ]
 }