diff --git a/src/puppet-web/browser.ts b/src/puppet-web/browser.ts
index ff94b1b6520c334219b8ec0ba074658202dba393..c75a34b2575932bafbd6ca2c42ec842d7afffa17 100644
--- a/src/puppet-web/browser.ts
+++ b/src/puppet-web/browser.ts
@@ -85,6 +85,7 @@ export class Browser extends EventEmitter {
     } catch (e) {
       log.error('PuppetWebBrowser', 'init() exception: %s', e.message)
 
+      this.state.current('close')
       await this.quit()
 
       throw e
@@ -99,7 +100,6 @@ export class Browser extends EventEmitter {
       await this.driver.get(url)
     } catch (e) {
       log.error('PuppetWebBrowser', 'open() exception: %s', e.message)
-      this.dead(e.message)
       throw e
     }
   }
@@ -117,7 +117,6 @@ export class Browser extends EventEmitter {
 
     await this.quit()
 
-    // if (this.currentState() === 'opening') {
     if (this.state.current() === 'open' && this.state.inprocess()) {
       log.warn('PuppetWebBrowser', 'restart() found state.current() === open and inprocess()')
       return
@@ -129,14 +128,12 @@ export class Browser extends EventEmitter {
   public async quit(): Promise<void> {
     log.verbose('PuppetWebBrowser', 'quit()')
 
-    // if (this.currentState() === 'closing') {
     if (this.state.current() === 'close' && this.state.inprocess()) {
       const e = new Error('quit() be called when state.current() is close with inprocess()?')
       log.warn('PuppetWebBrowser', e.message)
       throw e
     }
 
-    // this.currentState('closing')
     this.state.current('close', false)
 
     try {
@@ -327,7 +324,6 @@ export class Browser extends EventEmitter {
     if (forceReason) {
       dead = true
       msg = forceReason
-    // } else if (this.targetState() !== 'open') {
     } else if (this.state.target() !== 'open') {
       dead = true
       msg = 'state.target() not open'
@@ -343,15 +339,7 @@ export class Browser extends EventEmitter {
                                     : ''
                                   , msg
       )
-      // no need to quit here. dead event listener will do this async job, and do it better than here
-      // this.quit()
-
-      // if (this.targetState() !== 'open' || this.currentState() === 'opening') {
-      //   log.warn('PuppetWebBrowser', 'dead() wil not emit `dead` event because currentState is `opening` or targetState !== open')
-      // } else {
-      //   log.verbose('PuppetWebBrowser', 'dead() emit a `dead` event because %s', msg)
-      //   this.emit('dead', msg)
-      // }
+
       if (   this.state.target()  === 'open'
           && this.state.current() === 'open'
           && this.state.stable()
@@ -359,10 +347,11 @@ export class Browser extends EventEmitter {
         log.verbose('PuppetWebBrowser', 'dead() emit a `dead` event because %s', msg)
         this.emit('dead', msg)
       } else {
-        log.warn('PuppetWebBrowser', 'dead() wil not emit `dead` event because %s'
-                                    , 'state is not `stable open`'
+        log.warn('PuppetWebBrowser', 'dead() wil not emit `dead` event because states are: target(%s), current(%s), stable(%s)'
+                                    , this.state.target(), this.state.current(), this.state.stable()
         )
       }
+
     }
     return dead
   }
diff --git a/src/puppet-web/event.ts b/src/puppet-web/event.ts
index e8c813c2c9f6855e318023434f444aa6bf038343..85126ba02a90a65033af5728982fbd2280d3a7f7 100644
--- a/src/puppet-web/event.ts
+++ b/src/puppet-web/event.ts
@@ -82,7 +82,6 @@ async function onBrowserDead(this: PuppetWeb, e): Promise<void> {
     await this.browser.quit()
     log.verbose('PuppetWebEvent', 'onBrowserDead() browser quit-ed')
 
-    // if (this.browser.targetState() !== 'open') {
     if (browser.state.target() !== 'open') {
       log.warn('PuppetWebEvent', 'onBrowserDead() will not init browser because browser.state.target(%s) !== open'
                                 , browser.state.target()
diff --git a/src/puppet-web/puppet-web.ts b/src/puppet-web/puppet-web.ts
index d873479c5b94a73df014b1b41e3468be4cb53b52..388b4ddb06045f1b5d0093f0559a337d4332b75b 100644
--- a/src/puppet-web/puppet-web.ts
+++ b/src/puppet-web/puppet-web.ts
@@ -105,28 +105,24 @@ export class PuppetWeb extends Puppet {
 
   public async quit(): Promise<void> {
     log.verbose('PuppetWeb', 'quit()')
-    // this.targetState('dead')
 
     // XXX should we set `target` to `dead` in `quit()`?
-    this.state.target('dead')
+    // this.state.target('dead')
 
-    // if (this.currentState() === 'killing') {
     if (this.state.current() === 'dead' && this.state.inprocess()) {
       // log.warn('PuppetWeb', 'quit() is called but readyState is `disconnecting`?')
       log.warn('PuppetWeb', 'quit() is called but state.current()) is `dead` and inprocess()?')
       throw new Error('do not call quit again when quiting')
     }
 
-    // POISON must feed before readyState set to "disconnecting"
+    // POISON must feed before state set to `dead` & `inprocess`
     this.emit('watchdog', {
       data: 'PuppetWeb.quit()',
       type: 'POISON'
     })
 
-    // this.currentState('killing')
     this.state.current('dead', false)
 
-    // return co.call(this, function* () {
     try {
 
       if (this.bridge)  { // TODO use StateMonitor
@@ -153,25 +149,15 @@ export class PuppetWeb extends Puppet {
         // this.browser = null
       } else { log.warn('PuppetWeb', 'quit() without a browser') }
 
-      // @deprecated 20161004
-      // log.verbose('PuppetWeb', 'quit() server.quit() this.initAttach(null)')
-      // await this.initAttach(null)
-
-      // this.currentState('dead')
       this.state.current('dead')
-    // }).catch(e => { // Reject
     } catch (e) {
       log.error('PuppetWeb', 'quit() exception: %s', e.message)
-      // this.currentState('dead')
       this.state.current('dead')
       throw e
     }
 
-    // .then(() => { // Finally, Fail Safe
-      log.verbose('PuppetWeb', 'quit() done')
-      // this.currentState('dead')
-      this.state.current('dead')
-    // })
+    log.verbose('PuppetWeb', 'quit() done')
+    this.state.current('dead')
   }
 
   public async initBrowser(): Promise<void> {