diff --git a/packages/extension-ui/src/Popup/Authorize/Request.tsx b/packages/extension-ui/src/Popup/Authorize/Request.tsx
index 39882e1d..65f7e2b4 100644
--- a/packages/extension-ui/src/Popup/Authorize/Request.tsx
+++ b/packages/extension-ui/src/Popup/Authorize/Request.tsx
@@ -12,7 +12,7 @@ import { ActionBar, Button, Icon, IconBox, Link, Tip, defaults, withOnAction } f
 import { approveAuthRequest, rejectAuthRequest } from '../../messaging';
 
 type Props = {
-  authId: number,
+  authId: string,
   className?: string,
   isFirst: boolean,
   onAction: OnActionFromCtx,
diff --git a/packages/extension-ui/src/Popup/Signing/Details.tsx b/packages/extension-ui/src/Popup/Signing/Details.tsx
index 486e032d..3b2ca018 100644
--- a/packages/extension-ui/src/Popup/Signing/Details.tsx
+++ b/packages/extension-ui/src/Popup/Signing/Details.tsx
@@ -11,6 +11,7 @@ import { Metadata, Method } from '@polkadot/types';
 type Props = {
   className?: string,
   genesisHash: string,
+  isDecoded: boolean,
   method: string,
   nonce: string,
   url: string
@@ -39,7 +40,7 @@ function renderMethod (data: string, meta?: Metadata | null) {
   );
 }
 
-function Details ({ className, genesisHash, method, nonce, url }: Props) {
+function Details ({ className, genesisHash, isDecoded, method, nonce, url }: Props) {
   const chain = findChain(genesisHash);
 
   return (
@@ -57,7 +58,7 @@ function Details ({ className, genesisHash, method, nonce, url }: Props) {
           <td className='label'>nonce</td>
           <td className='data'>{nonce}</td>
         </tr>
-        {renderMethod(method, chain ? chain.meta : null)}
+        {renderMethod(method, (chain && isDecoded) ? chain.meta : null)}
       </tbody>
     </table>
   );
diff --git a/packages/extension-ui/src/Popup/Signing/Request.tsx b/packages/extension-ui/src/Popup/Signing/Request.tsx
index c19ee544..5153bc04 100644
--- a/packages/extension-ui/src/Popup/Signing/Request.tsx
+++ b/packages/extension-ui/src/Popup/Signing/Request.tsx
@@ -16,7 +16,7 @@ type Props = {
   isFirst: boolean,
   onAction: OnActionFromCtx,
   request: MessageExtrinsicSign,
-  signId: number,
+  signId: string,
   url: string
 };
 
@@ -33,6 +33,7 @@ function Request ({ isFirst, onAction, request: { address, genesisHash, method,
     <Address address={address}>
       <Details
         genesisHash={genesisHash}
+        isDecoded={isFirst}
         method={method}
         nonce={nonce}
         url={url}
diff --git a/packages/extension-ui/src/messaging.ts b/packages/extension-ui/src/messaging.ts
index 124d5e0d..df6d5cec 100644
--- a/packages/extension-ui/src/messaging.ts
+++ b/packages/extension-ui/src/messaging.ts
@@ -10,7 +10,7 @@ import extension from 'extensionizer';
 import { PORT_POPUP } from '@polkadot/extension/defaults';
 
 type Handlers = {
-  [index: number]: {
+  [index: string]: {
     resolve: (data: any) => void,
     reject: (error: Error) => void
   }
@@ -40,7 +40,7 @@ port.onMessage.addListener((data) => {
 
 function sendMessage (message: MessageTypes, request: any = {}): Promise<any> {
   return new Promise((resolve, reject) => {
-    const id = ++idCounter;
+    const id = `${Date.now()}.${++idCounter}`;
 
     handlers[id] = { resolve, reject };
 
@@ -64,11 +64,11 @@ export async function getAuthRequests (): Promise<Array<AuthorizeRequest>> {
   return sendMessage('authorize.requests');
 }
 
-export async function rejectAuthRequest (id: number): Promise<boolean> {
+export async function rejectAuthRequest (id: string): Promise<boolean> {
   return sendMessage('authorize.reject', { id });
 }
 
-export async function approveAuthRequest (id: number): Promise<boolean> {
+export async function approveAuthRequest (id: string): Promise<boolean> {
   return sendMessage('authorize.approve', { id });
 }
 
@@ -76,11 +76,11 @@ export async function getSignRequests (): Promise<Array<SigningRequest>> {
   return sendMessage('signing.requests');
 }
 
-export async function cancelSignRequest (id: number): Promise<boolean> {
+export async function cancelSignRequest (id: string): Promise<boolean> {
   return sendMessage('signing.cancel', { id });
 }
 
-export async function approveSignRequest (id: number, password: string): Promise<boolean> {
+export async function approveSignRequest (id: string, password: string): Promise<boolean> {
   return sendMessage('signing.approve', { id, password });
 }
 
diff --git a/packages/extension/src/background/handlers/State.ts b/packages/extension/src/background/handlers/State.ts
index ffa5ad91..96efa0f6 100644
--- a/packages/extension/src/background/handlers/State.ts
+++ b/packages/extension/src/background/handlers/State.ts
@@ -8,7 +8,7 @@ import extension from 'extensionizer';
 import { assert } from '@polkadot/util';
 
 type AuthRequest = {
-  id: number,
+  id: string,
   idStr: string,
   request: MessageAuthorize,
   resolve: (result: boolean) => void,
@@ -27,7 +27,7 @@ type AuthUrls = {
 };
 
 type SignRequest = {
-  id: number,
+  id: string,
   request: MessageExtrinsicSign,
   resolve: (result: MessageExtrinsicSign$Response) => void,
   reject: (error: Error) => void,
@@ -36,11 +36,15 @@ type SignRequest = {
 
 let idCounter = 0;
 
+function getId (): string {
+  return `${Date.now()}.${++idCounter}`;
+}
+
 export default class State {
   // at the moment, we are keeping the list in memory - this should be persisted
   private _authUrls: AuthUrls = {};
-  private _authRequests: { [index: number]: AuthRequest } = {};
-  private _signRequests: { [index: number]: SignRequest } = {};
+  private _authRequests: { [index: string]: AuthRequest } = {};
+  private _signRequests: { [index: string]: SignRequest } = {};
 
   get hasAuthRequests (): boolean {
     return this.numAuthRequests === 0;
@@ -70,7 +74,7 @@ export default class State {
       .map(({ id, request, url }) => [id, request, url]);
   }
 
-  private authComplete = (id: number, fn: Function) => {
+  private authComplete = (id: string, fn: Function) => {
     return (result: boolean | Error): void => {
       const isAllowed = result === true;
       const { idStr, request: { origin }, url } = this._authRequests[id];
@@ -90,7 +94,7 @@ export default class State {
     };
   }
 
-  private signComplete = (id: number, fn: Function) => {
+  private signComplete = (id: string, fn: Function) => {
     return (result: MessageExtrinsicSign$Response | Error): void => {
       delete this._signRequests[id];
       this.updateIcon();
@@ -129,7 +133,7 @@ export default class State {
     }
 
     return new Promise((resolve, reject) => {
-      const id = ++idCounter;
+      const id = getId();
 
       this._authRequests[id] = {
         id,
@@ -153,16 +157,16 @@ export default class State {
     return true;
   }
 
-  getAuthRequest (id: number): AuthRequest {
+  getAuthRequest (id: string): AuthRequest {
     return this._authRequests[id];
   }
 
-  getSignRequest (id: number): SignRequest {
+  getSignRequest (id: string): SignRequest {
     return this._signRequests[id];
   }
 
   signQueue (url: string, request: MessageExtrinsicSign): Promise<MessageExtrinsicSign$Response> {
-    const id = ++idCounter;
+    const id = getId();
 
     return new Promise((resolve, reject) => {
       this._signRequests[id] = {
diff --git a/packages/extension/src/background/handlers/index.ts b/packages/extension/src/background/handlers/index.ts
index 04c040a2..29f7d108 100644
--- a/packages/extension/src/background/handlers/index.ts
+++ b/packages/extension/src/background/handlers/index.ts
@@ -15,7 +15,7 @@ const state = new State();
 const extension = new Extension(state);
 const tabs = new Tabs(state);
 
-function createSubscription (id: number, port: chrome.runtime.Port): (data: any) => void {
+function createSubscription (id: string, port: chrome.runtime.Port): (data: any) => void {
   // FIXME We are not handling actual unsubscribes yet, this is an issue
   return (subscription: any) => {
     port.postMessage({ id, subscription });
diff --git a/packages/extension/src/background/types.ts b/packages/extension/src/background/types.ts
index 6561ea56..1f76c32d 100644
--- a/packages/extension/src/background/types.ts
+++ b/packages/extension/src/background/types.ts
@@ -6,31 +6,31 @@ import { KeypairType } from '@polkadot/util-crypto/types';
 
 export type MessageTypes = 'authorize.approve' | 'authorize.reject' | 'authorize.requests' | 'authorize.tab' | 'accounts.create' | 'accounts.edit' | 'accounts.forget' | 'accounts.list' | 'accounts.subscribe' | 'extrinsic.sign' | 'seed.create' | 'seed.validate' | 'signing.approve' | 'signing.cancel' | 'signing.requests';
 
-export type AuthorizeRequest = [number, MessageAuthorize, string];
+export type AuthorizeRequest = [string, MessageAuthorize, string];
 
-export type SigningRequest = [number, MessageExtrinsicSign, string];
+export type SigningRequest = [string, MessageExtrinsicSign, string];
 
 export type MessageAuthorize = {
   origin: string
 };
 
 export type MessageAuthorizeApprove = {
-  id: number;
+  id: string;
 };
 
 export type MessageAuthorizeReject = {
-  id: number;
+  id: string;
 };
 
 export type MessageRequest = {
-  id: number,
+  id: string,
   message: MessageTypes,
   request: any
 };
 
 export type MessageResponse = {
   error?: string,
-  id: number,
+  id: string,
   response?: any,
   subscription?: any
 };
@@ -52,12 +52,12 @@ export type MessageAccountForget = {
 };
 
 export type MessageExtrinsicSignApprove = {
-  id: number,
+  id: string,
   password: string
 };
 
 export type MessageExtrinsicSignCancel = {
-  id: number
+  id: string
 };
 
 export type MessageExtrinsicSign = {
@@ -69,7 +69,7 @@ export type MessageExtrinsicSign = {
 };
 
 export type MessageExtrinsicSign$Response = {
-  id: number,
+  id: string,
   signature: string
 };
 
diff --git a/packages/extension/src/page/index.ts b/packages/extension/src/page/index.ts
index 603a7ad3..9cd2149f 100644
--- a/packages/extension/src/page/index.ts
+++ b/packages/extension/src/page/index.ts
@@ -15,7 +15,7 @@ import Injected from './Injected';
 //  - resolves/rejects the promise with the result (or sub data)
 
 type Handlers = {
-  [index: number]: {
+  [index: string]: {
     resolve: (data: any) => void,
     reject: (error: Error) => void,
     subscriber?: (data: any) => void
@@ -31,7 +31,7 @@ let idCounter = 0;
 // resolve once the event is resolved (by the response listener just below this)
 function sendMessage (message: MessageTypes, request: any = null, subscriber?: (data: any) => void): Promise<any> {
   return new Promise((resolve, reject) => {
-    const id = ++idCounter;
+    const id = `${Date.now()}.${++idCounter}`;
 
     handlers[id] = { resolve, reject, subscriber };