diff --git a/src/actions/operation.js b/src/actions/operation.js
index 295fd4f..0bb8310 100644
--- a/src/actions/operation.js
+++ b/src/actions/operation.js
@@ -2,6 +2,9 @@ import operations from 'shared/operations';
 import messages from 'content/messages';
 import * as tabs from 'background/tabs';
 import * as zooms from 'background/zooms';
+import * as scrolls from 'content/scrolls';
+import * as navigates from 'content/navigates';
+import * as followActions from 'actions/follow';
 
 const sendConsoleShowCommand = (tab, command) => {
   return browser.tabs.sendMessage(tab.id, {
@@ -10,7 +13,43 @@ const sendConsoleShowCommand = (tab, command) => {
   });
 };
 
-const exec = (operation, tab) => {
+const exec = (operation) => {
+  switch (operation.type) {
+  case operations.SCROLL_LINES:
+    return scrolls.scrollLines(window, operation.count);
+  case operations.SCROLL_PAGES:
+    return scrolls.scrollPages(window, operation.count);
+  case operations.SCROLL_TOP:
+    return scrolls.scrollTop(window);
+  case operations.SCROLL_BOTTOM:
+    return scrolls.scrollBottom(window);
+  case operations.SCROLL_HOME:
+    return scrolls.scrollLeft(window);
+  case operations.SCROLL_END:
+    return scrolls.scrollRight(window);
+  case operations.FOLLOW_START:
+    return followActions.enable(false);
+  case operations.NAVIGATE_HISTORY_PREV:
+    return navigates.historyPrev(window);
+  case operations.NAVIGATE_HISTORY_NEXT:
+    return navigates.historyNext(window);
+  case operations.NAVIGATE_LINK_PREV:
+    return navigates.linkPrev(window);
+  case operations.NAVIGATE_LINK_NEXT:
+    return navigates.linkNext(window);
+  case operations.NAVIGATE_PARENT:
+    return navigates.parent(window);
+  case operations.NAVIGATE_ROOT:
+    return navigates.root(window);
+  default:
+    browser.runtime.sendMessage({
+      type: messages.BACKGROUND_OPERATION,
+      operation,
+    });
+  }
+};
+
+const execBackground = (operation, tab) => {
   switch (operation.type) {
   case operations.TAB_CLOSE:
     return tabs.closeTab(tab.id);
@@ -45,11 +84,8 @@ const exec = (operation, tab) => {
   case operations.COMMAND_SHOW_BUFFER:
     return sendConsoleShowCommand(tab, 'buffer ');
   default:
-    return browser.tabs.sendMessage(tab.id, {
-      type: messages.CONTENT_OPERATION,
-      operation
-    });
+    return Promise.resolve();
   }
 };
 
-export { exec };
+export { exec, execBackground };
diff --git a/src/background/index.js b/src/background/index.js
index b966c13..dbc10fb 100644
--- a/src/background/index.js
+++ b/src/background/index.js
@@ -1,7 +1,6 @@
 import * as settingsActions from 'actions/setting';
 import messages from 'content/messages';
 import BackgroundComponent from 'components/background';
-import BackgroundInputComponent from 'components/background-input';
 import reducers from 'reducers';
 import { createStore } from 'store';
 
@@ -15,10 +14,8 @@ const store = createStore(reducers, (e, sender) => {
   }
 });
 const backgroundComponent = new BackgroundComponent(store);
-const backgroundInputComponent = new BackgroundInputComponent(store);
 store.subscribe((sender) => {
   backgroundComponent.update(sender);
-  backgroundInputComponent.update(sender);
 });
 
 store.dispatch(settingsActions.load());
diff --git a/src/components/background-input.js b/src/components/background-input.js
deleted file mode 100644
index bd6ecf9..0000000
--- a/src/components/background-input.js
+++ /dev/null
@@ -1,53 +0,0 @@
-import * as inputActions from 'actions/input';
-import * as operationActions from 'actions/operation';
-
-export default class BackgroundInputComponent {
-  constructor(store) {
-    this.store = store;
-    this.keymaps = {};
-    this.prevInputs = [];
-  }
-
-  update(sender) {
-    let state = this.store.getState();
-    this.reloadSettings(state.setting);
-    this.handleKeyInputs(sender, state.input);
-  }
-
-  reloadSettings(setting) {
-    if (!setting.settings.json) {
-      return;
-    }
-    this.keymaps = JSON.parse(setting.settings.json).keymaps;
-  }
-
-  handleKeyInputs(sender, input) {
-    if (JSON.stringify(this.prevInputs) === JSON.stringify(input)) {
-      return;
-    }
-    this.prevInputs = input;
-
-    if (input.keys.length === 0) {
-      return;
-    }
-    if (sender) {
-      return this.handleKeysChanged(sender, input);
-    }
-  }
-
-  handleKeysChanged(sender, input) {
-    let matched = Object.keys(this.keymaps).filter((keyStr) => {
-      return keyStr.startsWith(input.keys);
-    });
-    if (matched.length === 0) {
-      this.store.dispatch(inputActions.clearKeys(), sender);
-      return Promise.resolve();
-    } else if (matched.length > 1 ||
-      matched.length === 1 && input.keys !== matched[0]) {
-      return Promise.resolve();
-    }
-    let operation = this.keymaps[matched];
-    this.store.dispatch(operationActions.exec(operation, sender.tab), sender);
-    this.store.dispatch(inputActions.clearKeys(), sender);
-  }
-}
diff --git a/src/components/background.js b/src/components/background.js
index 487e3af..4961d85 100644
--- a/src/components/background.js
+++ b/src/components/background.js
@@ -1,5 +1,5 @@
 import messages from 'content/messages';
-import * as inputActions from 'actions/input';
+import * as operationActions from 'actions/operation';
 import * as settingsActions from 'actions/setting';
 import * as tabActions from 'actions/tab';
 import * as commands from 'shared/commands';
@@ -35,9 +35,10 @@ export default class BackgroundComponent {
 
   onMessage(message, sender) {
     switch (message.type) {
-    case messages.KEYDOWN:
+    case messages.BACKGROUND_OPERATION:
       return this.store.dispatch(
-        inputActions.keyPress(message.key, message.ctrl), sender);
+        operationActions.execBackground(message.operation, sender.tab),
+        sender);
     case messages.OPEN_URL:
       if (message.newTab) {
         return this.store.dispatch(
@@ -56,10 +57,23 @@ export default class BackgroundComponent {
           text: e.message,
         });
       });
+    case messages.SETTINGS_QUERY:
+      return Promise.resolve(this.store.getState().setting.settings);
     case messages.CONSOLE_QUERY_COMPLETIONS:
       return commands.complete(message.text, this.settings);
     case messages.SETTINGS_RELOAD:
       this.store.dispatch(settingsActions.load());
+      return this.broadcastSettingsChanged();
     }
   }
+
+  broadcastSettingsChanged() {
+    return browser.tabs.query({}).then((tabs) => {
+      for (let tab of tabs) {
+        browser.tabs.sendMessage(tab.id, {
+          type: messages.SETTINGS_CHANGED,
+        });
+      }
+    });
+  }
 }
diff --git a/src/components/content-input.js b/src/components/content-input.js
index 38d57fd..9568caf 100644
--- a/src/components/content-input.js
+++ b/src/components/content-input.js
@@ -1,14 +1,20 @@
-import messages from 'content/messages';
-
 export default class ContentInputComponent {
   constructor(target) {
     this.pressed = {};
+    this.onKeyListeners = [];
 
     target.addEventListener('keypress', this.onKeyPress.bind(this));
     target.addEventListener('keydown', this.onKeyDown.bind(this));
     target.addEventListener('keyup', this.onKeyUp.bind(this));
   }
 
+  update() {
+  }
+
+  onKey(cb) {
+    this.onKeyListeners.push(cb);
+  }
+
   onKeyPress(e) {
     if (this.pressed[e.key] && this.pressed[e.key] !== 'keypress') {
       return;
@@ -30,18 +36,32 @@ export default class ContentInputComponent {
   }
 
   capture(e) {
-    if (e.target instanceof HTMLInputElement ||
-      e.target instanceof HTMLTextAreaElement ||
-      e.target instanceof HTMLSelectElement) {
+    if (this.fromInput(e)) {
       if (e.key === 'Escape' && e.target.blur) {
         e.target.blur();
       }
       return;
     }
-    browser.runtime.sendMessage({
-      type: messages.KEYDOWN,
-      key: e.key,
-      ctrl: e.ctrlKey
-    });
+    if (e.key === 'OS') {
+      return;
+    }
+
+    let stop = false;
+    for (let listener of this.onKeyListeners) {
+      stop = stop || listener(e.key, e.ctrlKey);
+      if (stop) {
+        break;
+      }
+    }
+    if (stop) {
+      e.preventDefault();
+      e.stopPropagation();
+    }
+  }
+
+  fromInput(e) {
+    return e.target instanceof HTMLInputElement ||
+      e.target instanceof HTMLTextAreaElement ||
+      e.target instanceof HTMLSelectElement;
   }
 }
diff --git a/src/components/follow.js b/src/components/follow.js
index 9221759..eedbd4d 100644
--- a/src/components/follow.js
+++ b/src/components/follow.js
@@ -5,21 +5,6 @@ import HintKeyProducer from 'content/hint-key-producer';
 
 const DEFAULT_HINT_CHARSET = 'abcdefghijklmnopqrstuvwxyz';
 
-const availableKey = (keyCode) => {
-  return (
-    KeyboardEvent.DOM_VK_0 <= keyCode && keyCode <= KeyboardEvent.DOM_VK_9 ||
-    KeyboardEvent.DOM_VK_A <= keyCode && keyCode <= KeyboardEvent.DOM_VK_Z
-  );
-};
-
-const isNumericKey = (code) => {
-  return KeyboardEvent.DOM_VK_0 <= code && code <= KeyboardEvent.DOM_VK_9;
-};
-
-const isAlphabeticKey = (code) => {
-  return KeyboardEvent.DOM_VK_A <= code && code <= KeyboardEvent.DOM_VK_Z;
-};
-
 const inWindow = (window, element) => {
   let {
     top, left, bottom, right
@@ -37,9 +22,6 @@ export default class FollowComponent {
     this.store = store;
     this.hintElements = {};
     this.state = {};
-
-    let doc = wrapper.ownerDocument;
-    doc.addEventListener('keydown', this.onKeyDown.bind(this));
   }
 
   update() {
@@ -49,56 +31,50 @@ export default class FollowComponent {
       this.create();
     } else if (prevState.enabled && !this.state.enabled) {
       this.remove();
-    } else if (JSON.stringify(prevState.keys) !==
-      JSON.stringify(this.state.keys)) {
+    } else if (prevState.keys !== this.state.keys) {
       this.updateHints();
     }
   }
 
-  onKeyDown(e) {
+  key(key) {
     if (!this.state.enabled) {
-      return;
+      return false;
     }
 
-    let { keyCode } = e;
-    switch (keyCode) {
-    case KeyboardEvent.DOM_VK_ENTER:
-    case KeyboardEvent.DOM_VK_RETURN:
-      this.activate(this.hintElements[
-        FollowComponent.codeChars(this.state.keys)].target);
+    switch (key) {
+    case 'Enter':
+      this.activate(this.hintElements[this.state.keys].target);
       return;
-    case KeyboardEvent.DOM_VK_ESCAPE:
+    case 'Escape':
       this.store.dispatch(followActions.disable());
       return;
-    case KeyboardEvent.DOM_VK_BACK_SPACE:
-    case KeyboardEvent.DOM_VK_DELETE:
+    case 'Backspace':
+    case 'Delete':
       this.store.dispatch(followActions.backspace());
       break;
     default:
-      if (availableKey(keyCode)) {
-        this.store.dispatch(followActions.keyPress(keyCode));
+      if (DEFAULT_HINT_CHARSET.includes(key)) {
+        this.store.dispatch(followActions.keyPress(key));
       }
       break;
     }
-
-    e.stopPropagation();
-    e.preventDefault();
+    return true;
   }
 
   updateHints() {
-    let chars = FollowComponent.codeChars(this.state.keys);
+    let keys = this.state.keys;
     let shown = Object.keys(this.hintElements).filter((key) => {
-      return key.startsWith(chars);
+      return key.startsWith(keys);
     });
     let hidden = Object.keys(this.hintElements).filter((key) => {
-      return !key.startsWith(chars);
+      return !key.startsWith(keys);
     });
     if (shown.length === 0) {
       this.remove();
       return;
     } else if (shown.length === 1) {
-      this.activate(this.hintElements[chars].target);
-      this.remove();
+      this.activate(this.hintElements[keys].target);
+      this.store.dispatch(followActions.disable());
     }
 
     shown.forEach((key) => {
@@ -177,24 +153,6 @@ export default class FollowComponent {
     });
   }
 
-  static codeChars(codes) {
-    const CHARCODE_ZERO = '0'.charCodeAt(0);
-    const CHARCODE_A = 'a'.charCodeAt(0);
-
-    let chars = '';
-
-    for (let code of codes) {
-      if (isNumericKey(code)) {
-        chars += String.fromCharCode(
-          code - KeyboardEvent.DOM_VK_0 + CHARCODE_ZERO);
-      } else if (isAlphabeticKey(code)) {
-        chars += String.fromCharCode(
-          code - KeyboardEvent.DOM_VK_A + CHARCODE_A);
-      }
-    }
-    return chars;
-  }
-
   static getTargetElements(doc) {
     let all = doc.querySelectorAll('a,button,input,textarea');
     let filtered = Array.prototype.filter.call(all, (element) => {
diff --git a/src/components/keymapper.js b/src/components/keymapper.js
new file mode 100644
index 0000000..3685a4f
--- /dev/null
+++ b/src/components/keymapper.js
@@ -0,0 +1,43 @@
+import * as inputActions from 'actions/input';
+import * as operationActions from 'actions/operation';
+
+export default class KeymapperComponent {
+  constructor(store) {
+    this.store = store;
+  }
+
+  update() {
+  }
+
+  key(key, ctrl) {
+    let keymaps = this.keymaps();
+    if (!keymaps) {
+      return;
+    }
+    this.store.dispatch(inputActions.keyPress(key, ctrl));
+
+    let input = this.store.getState().input;
+    let matched = Object.keys(keymaps).filter((keyStr) => {
+      return keyStr.startsWith(input.keys);
+    });
+    if (matched.length === 0) {
+      this.store.dispatch(inputActions.clearKeys());
+      return false;
+    } else if (matched.length > 1 ||
+      matched.length === 1 && input.keys !== matched[0]) {
+      return true;
+    }
+    let operation = keymaps[matched];
+    this.store.dispatch(operationActions.exec(operation));
+    this.store.dispatch(inputActions.clearKeys());
+    return true;
+  }
+
+  keymaps() {
+    let settings = this.store.getState().setting.settings;
+    if (!settings || !settings.json) {
+      return null;
+    }
+    return JSON.parse(settings.json).keymaps;
+  }
+}
diff --git a/src/content/index.js b/src/content/index.js
index b29118d..d380291 100644
--- a/src/content/index.js
+++ b/src/content/index.js
@@ -1,58 +1,41 @@
 import './console-frame.scss';
 import * as consoleFrames from './console-frames';
-import * as scrolls from 'content/scrolls';
-import * as navigates from 'content/navigates';
-import * as followActions from 'actions/follow';
+import * as settingActions from 'actions/setting';
 import { createStore } from 'store';
 import ContentInputComponent from 'components/content-input';
+import KeymapperComponent from 'components/keymapper';
 import FollowComponent from 'components/follow';
 import reducers from 'reducers';
-import operations from 'shared/operations';
 import messages from './messages';
 
 const store = createStore(reducers);
 const followComponent = new FollowComponent(window.document.body, store);
+const contentInputComponent =
+  new ContentInputComponent(window.document.body, store);
+const keymapperComponent = new KeymapperComponent(store);
+contentInputComponent.onKey((key, ctrl) => {
+  return followComponent.key(key, ctrl);
+});
+contentInputComponent.onKey((key, ctrl) => {
+  return keymapperComponent.key(key, ctrl);
+});
 store.subscribe(() => {
   try {
     followComponent.update();
+    contentInputComponent.update();
   } catch (e) {
     console.error(e);
   }
 });
-// eslint-disable-next-line no-unused-vars
-const contentInputComponent = new ContentInputComponent(window);
 
 consoleFrames.initialize(window.document);
 
-const execOperation = (operation) => {
-  switch (operation.type) {
-  case operations.SCROLL_LINES:
-    return scrolls.scrollLines(window, operation.count);
-  case operations.SCROLL_PAGES:
-    return scrolls.scrollPages(window, operation.count);
-  case operations.SCROLL_TOP:
-    return scrolls.scrollTop(window);
-  case operations.SCROLL_BOTTOM:
-    return scrolls.scrollBottom(window);
-  case operations.SCROLL_HOME:
-    return scrolls.scrollLeft(window);
-  case operations.SCROLL_END:
-    return scrolls.scrollRight(window);
-  case operations.FOLLOW_START:
-    return store.dispatch(followActions.enable(false));
-  case operations.NAVIGATE_HISTORY_PREV:
-    return navigates.historyPrev(window);
-  case operations.NAVIGATE_HISTORY_NEXT:
-    return navigates.historyNext(window);
-  case operations.NAVIGATE_LINK_PREV:
-    return navigates.linkPrev(window);
-  case operations.NAVIGATE_LINK_NEXT:
-    return navigates.linkNext(window);
-  case operations.NAVIGATE_PARENT:
-    return navigates.parent(window);
-  case operations.NAVIGATE_ROOT:
-    return navigates.root(window);
-  }
+const reloadSettings = () => {
+  return browser.runtime.sendMessage({
+    type: messages.SETTINGS_QUERY,
+  }).then((settings) => {
+    store.dispatch(settingActions.set(settings));
+  });
 };
 
 browser.runtime.onMessage.addListener((action) => {
@@ -61,10 +44,11 @@ browser.runtime.onMessage.addListener((action) => {
     window.focus();
     consoleFrames.blur(window.document);
     return Promise.resolve();
-  case messages.CONTENT_OPERATION:
-    execOperation(action.operation);
-    return Promise.resolve();
+  case messages.SETTINGS_CHANGED:
+    return reloadSettings();
   default:
     return Promise.resolve();
   }
 });
+
+reloadSettings();
diff --git a/src/content/messages.js b/src/content/messages.js
index 0e66fa0..138f0e0 100644
--- a/src/content/messages.js
+++ b/src/content/messages.js
@@ -1,5 +1,7 @@
 export default {
-  CONTENT_OPERATION: 'content.operation',
+  SETTINGS_QUERY: 'settings.query',
+
+  BACKGROUND_OPERATION: 'background.operation',
 
   CONSOLE_BLURRED: 'console.blured',
   CONSOLE_ENTERED: 'console.entered',
@@ -8,8 +10,6 @@ export default {
   CONSOLE_SHOW_ERROR: 'console.show.error',
   CONSOLE_HIDE: 'console.hide',
 
-  KEYDOWN: 'keydown',
-
   OPEN_URL: 'open.url',
 
   SETTINGS_RELOAD: 'settings.reload',
diff --git a/src/reducers/follow.js b/src/reducers/follow.js
index a2397b4..ed875e8 100644
--- a/src/reducers/follow.js
+++ b/src/reducers/follow.js
@@ -3,7 +3,7 @@ import actions from 'actions';
 const defaultState = {
   enabled: false,
   newTab: false,
-  keys: [],
+  keys: '',
 };
 
 export default function reducer(state = defaultState, action = {}) {
@@ -12,6 +12,7 @@ export default function reducer(state = defaultState, action = {}) {
     return Object.assign({}, state, {
       enabled: true,
       newTab: action.newTab,
+      keys: '',
     });
   case actions.FOLLOW_DISABLE:
     return Object.assign({}, state, {
@@ -19,7 +20,7 @@ export default function reducer(state = defaultState, action = {}) {
     });
   case actions.FOLLOW_KEY_PRESS:
     return Object.assign({}, state, {
-      keys: state.keys.concat([action.key]),
+      keys: state.keys + action.key,
     });
   case actions.FOLLOW_BACKSPACE:
     return Object.assign({}, state, {
diff --git a/test/components/follow.test.js b/test/components/follow.test.js
index c83e211..294bfc9 100644
--- a/test/components/follow.test.js
+++ b/test/components/follow.test.js
@@ -2,16 +2,6 @@ import { expect } from "chai";
 import FollowComponent from 'components/follow';
 
 describe('FollowComponent', () => {
-  describe('#codeChars', () => {
-    it('returns a string for key codes', () => {
-      let chars = [
-        KeyboardEvent.DOM_VK_0, KeyboardEvent.DOM_VK_1,
-        KeyboardEvent.DOM_VK_A, KeyboardEvent.DOM_VK_B];
-      expect(FollowComponent.codeChars(chars)).to.equal('01ab');
-      expect(FollowComponent.codeChars([])).to.be.equal('');
-    });
-  });
-
   describe('#getTargetElements', () => {
     beforeEach(() => {
       document.body.innerHTML = __html__['test/components/follow.html'];
diff --git a/test/reducers/follow.test.js b/test/reducers/follow.test.js
index 79e75d4..e1db680 100644
--- a/test/reducers/follow.test.js
+++ b/test/reducers/follow.test.js
@@ -7,7 +7,7 @@ describe('follow reducer', () => {
     let state = followReducer(undefined, {});
     expect(state).to.have.property('enabled', false);
     expect(state).to.have.property('newTab');
-    expect(state).to.have.deep.property('keys', []);
+    expect(state).to.have.deep.property('keys', '');
   });
 
   it ('returns next state for FOLLOW_ENABLE', () => {
@@ -15,6 +15,7 @@ describe('follow reducer', () => {
     let state = followReducer({ enabled: false, newTab: false }, action);
     expect(state).to.have.property('enabled', true);
     expect(state).to.have.property('newTab', true);
+    expect(state).to.have.property('keys', '');
   });
 
   it ('returns next state for FOLLOW_DISABLE', () => {
@@ -24,24 +25,24 @@ describe('follow reducer', () => {
   });
 
   it ('returns next state for FOLLOW_KEY_PRESS', () => {
-    let action = { type: actions.FOLLOW_KEY_PRESS, key: 100};
-    let state = followReducer({ keys: [] }, action);
-    expect(state).to.have.deep.property('keys', [100]);
+    let action = { type: actions.FOLLOW_KEY_PRESS, key: 'a'};
+    let state = followReducer({ keys: '' }, action);
+    expect(state).to.have.deep.property('keys', 'a');
 
-    action = { type: actions.FOLLOW_KEY_PRESS, key: 200};
+    action = { type: actions.FOLLOW_KEY_PRESS, key: 'b'};
     state = followReducer(state, action);
-    expect(state).to.have.deep.property('keys', [100, 200]);
+    expect(state).to.have.deep.property('keys', 'ab');
   });
 
   it ('returns next state for FOLLOW_BACKSPACE', () => {
     let action = { type: actions.FOLLOW_BACKSPACE };
-    let state = followReducer({ keys: [100, 200] }, action);
-    expect(state).to.have.deep.property('keys', [100]);
+    let state = followReducer({ keys: 'ab' }, action);
+    expect(state).to.have.deep.property('keys', 'a');
 
     state = followReducer(state, action);
-    expect(state).to.have.deep.property('keys', []);
+    expect(state).to.have.deep.property('keys', '');
 
     state = followReducer(state, action);
-    expect(state).to.have.deep.property('keys', []);
+    expect(state).to.have.deep.property('keys', '');
   });
 });