diff --git a/manifest.json b/manifest.json
index dfb4ae9..7c60cdd 100644
--- a/manifest.json
+++ b/manifest.json
@@ -15,11 +15,15 @@
     ]
   },
   "permissions": [
+    "history",
     "sessions",
-    "tabs",
-    "history"
+    "storage",
+    "tabs"
   ],
   "web_accessible_resources": [
     "build/console.html"
-  ]
+  ],
+  "options_ui": {
+    "page": "build/settings.html"
+  }
 }
diff --git a/src/actions/index.js b/src/actions/index.js
index 977b3c2..7b79864 100644
--- a/src/actions/index.js
+++ b/src/actions/index.js
@@ -8,4 +8,5 @@ export default {
   // User input
   INPUT_KEY_PRESS: 'input.key,press',
   INPUT_CLEAR_KEYS: 'input.clear.keys',
+  INPUT_SET_KEYMAPS: 'input.set,keymaps',
 };
diff --git a/src/actions/input.js b/src/actions/input.js
index 07948a1..de6de4e 100644
--- a/src/actions/input.js
+++ b/src/actions/input.js
@@ -14,4 +14,11 @@ const clearKeys = () => {
   };
 };
 
-export { keyPress, clearKeys };
+const setKeymaps = (keymaps) => {
+  return {
+    type: actions.INPUT_SET_KEYMAPS,
+    keymaps: keymaps
+  };
+};
+
+export { keyPress, clearKeys, setKeymaps };
diff --git a/src/actions/operation.js b/src/actions/operation.js
index 50329f8..5646c1c 100644
--- a/src/actions/operation.js
+++ b/src/actions/operation.js
@@ -6,15 +6,15 @@ import * as zooms from '../background/zooms';
 
 const exec = (operation, tab) => {
   switch (operation.type) {
-  case operations.TABS_CLOSE:
+  case operations.TAB_CLOSE:
     return tabs.closeTab(tab.id);
-  case operations.TABS_REOPEN:
+  case operations.TAB_REOPEN:
     return tabs.reopenTab();
-  case operations.TABS_PREV:
+  case operations.TAB_PREV:
     return tabs.selectPrevTab(tab.index, operation.count);
-  case operations.TABS_NEXT:
+  case operations.TAB_NEXT:
     return tabs.selectNextTab(tab.index, operation.count);
-  case operations.TABS_RELOAD:
+  case operations.TAB_RELOAD:
     return tabs.reload(tab, operation.cache);
   case operations.ZOOM_IN:
     return zooms.zoomIn();
@@ -22,21 +22,21 @@ const exec = (operation, tab) => {
     return zooms.zoomOut();
   case operations.ZOOM_NEUTRAL:
     return zooms.neutral();
-  case operations.COMMAND_OPEN:
+  case operations.COMMAND_SHOW:
     return consoleActions.showCommand('');
-  case operations.COMMAND_TABS_OPEN:
+  case operations.COMMAND_SHOW_OPEN:
     if (operation.alter) {
       // alter url
       return consoleActions.showCommand('open ' + tab.url);
     }
     return consoleActions.showCommand('open ');
-  case operations.COMMAND_TABS_NEW:
+  case operations.COMMAND_SHOW_TABOPEN:
     if (operation.alter) {
       // alter url
       return consoleActions.showCommand('tabopen ' + tab.url);
     }
     return consoleActions.showCommand('tabopen ');
-  case operations.COMMAND_BUFFER:
+  case operations.COMMAND_SHOW_BUFFER:
     return consoleActions.showCommand('buffer ');
   default:
     return browser.tabs.sendMessage(tab.id, {
diff --git a/src/background/default-settings.js b/src/background/default-settings.js
new file mode 100644
index 0000000..ea6318b
--- /dev/null
+++ b/src/background/default-settings.js
@@ -0,0 +1,39 @@
+export default `{
+  "keymaps": {
+    "0": { "type": "scroll.home" },
+    ":": { "type": "command.show" },
+    "o": { "type": "command.show.open", "alter": false },
+    "O": { "type": "command.show.open", "alter": true },
+    "t": { "type": "command.show.tabopen", "alter": false },
+    "T": { "type": "command.show.tabopen", "alter": true },
+    "b": { "type": "command.show.buffer" },
+    "k": { "type": "scroll.lines", "count": -1 },
+    "j": { "type": "scroll.lines", "count": 1 },
+    "<C-E>": { "type": "scroll.lines", "count": -1 },
+    "<C-Y>": { "type": "scroll.lines", "count": 1 },
+    "<C-U>": { "type": "scroll.pages", "count": -0.5 },
+    "<C-D>": { "type": "scroll.pages", "count": 0.5 },
+    "<C-B>": { "type": "scroll.pages", "count": -1 },
+    "<C-F>": { "type": "scroll.pages", "count": 1 },
+    "gg": { "type": "scroll.top" },
+    "G": { "type": "scroll.bottom" },
+    "$": { "type": "scroll.end" },
+    "d": { "type": "tabs.close" },
+    "u": { "type": "tabs.reopen" },
+    "h": { "type": "tabs.prev", "count": 1 },
+    "l": { "type": "tabs.next", "count": 1 },
+    "r": { "type": "tabs.reload", "cache": false },
+    "R": { "type": "tabs.reload", "cache": true },
+    "zi": { "type": "zoom.in" },
+    "zo": { "type": "zoom.out" },
+    "zz": { "type": "zoom.neutral" },
+    "f": { "type": "follow.start", "newTab": false },
+    "F": { "type": "follow.start", "newTab": true },
+    "H": { "type": "navigate.history.prev" },
+    "L": { "type": "navigate.history.next" },
+    "[[": { "type": "navigate.link.prev" },
+    "]]": { "type": "navigate.link.next" },
+    "gu": { "type": "navigate.parent" },
+    "gU": { "type": "navigate.root" }
+  }
+}`;
diff --git a/src/background/index.js b/src/background/index.js
index 9df22fd..5ae967c 100644
--- a/src/background/index.js
+++ b/src/background/index.js
@@ -41,7 +41,7 @@ backgroundStore.subscribe((sender) => {
 
 const keyQueueChanged = (state, sender) => {
   let prefix = keys.asKeymapChars(state.input.keys);
-  let matched = Object.keys(keys.defaultKeymap).filter((keyStr) => {
+  let matched = Object.keys(state.input.keymaps).filter((keyStr) => {
     return keyStr.startsWith(prefix);
   });
   if (matched.length === 0) {
@@ -51,11 +51,19 @@ const keyQueueChanged = (state, sender) => {
     matched.length === 1 && prefix !== matched[0]) {
     return Promise.resolve();
   }
-  let action = keys.defaultKeymap[matched];
+  let action = state.input.keymaps[matched];
   backgroundStore.dispatch(operationActions.exec(action, sender.tab), sender);
   backgroundStore.dispatch(inputActions.clearKeys(), sender);
 };
 
+const reloadSettings = () => {
+  browser.storage.local.get('settings').then((value) => {
+    let settings = JSON.parse(value.settings.json);
+    let action = inputActions.setKeymaps(settings.keymaps);
+    backgroundStore.dispatch(action);
+  }, console.error);
+};
+
 const handleMessage = (message, sender) => {
   switch (message.type) {
   case messages.KEYDOWN:
@@ -77,6 +85,8 @@ const handleMessage = (message, sender) => {
   case messages.CONSOLE_CHANGEED:
     return backgroundStore.dispatch(
       commandActions.complete(message.text), sender);
+  case messages.SETTINGS_RELOAD:
+    return reloadSettings();
   }
 };
 
@@ -87,3 +97,9 @@ browser.runtime.onMessage.addListener((message, sender) => {
     backgroundStore.dispatch(consoleActions.showError(e.message), sender);
   }
 });
+
+const initializeSettings = () => {
+  reloadSettings();
+};
+
+initializeSettings();
diff --git a/src/background/keys.js b/src/background/keys.js
index e4a8b19..aca050e 100644
--- a/src/background/keys.js
+++ b/src/background/keys.js
@@ -1,43 +1,3 @@
-import operations from '../operations';
-
-const defaultKeymap = {
-  ':': { type: operations.COMMAND_OPEN },
-  'o': { type: operations.COMMAND_TABS_OPEN, alter: false },
-  'O': { type: operations.COMMAND_TABS_OPEN, alter: true },
-  't': { type: operations.COMMAND_TABS_NEW, alter: false },
-  'T': { type: operations.COMMAND_TABS_NEW, alter: true },
-  'b': { type: operations.COMMAND_BUFFER },
-  'k': { type: operations.SCROLL_LINES, count: -1 },
-  'j': { type: operations.SCROLL_LINES, count: 1 },
-  '<C-E>': { type: operations.SCROLL_LINES, count: -1 },
-  '<C-Y>': { type: operations.SCROLL_LINES, count: 1 },
-  '<C-U>': { type: operations.SCROLL_PAGES, count: -0.5 },
-  '<C-D>': { type: operations.SCROLL_PAGES, count: 0.5 },
-  '<C-B>': { type: operations.SCROLL_PAGES, count: -1 },
-  '<C-F>': { type: operations.SCROLL_PAGES, count: 1 },
-  'gg': { type: operations.SCROLL_TOP },
-  'G': { type: operations.SCROLL_BOTTOM },
-  '0': { type: operations.SCROLL_LEFT },
-  '$': { type: operations.SCROLL_RIGHT },
-  'd': { type: operations.TABS_CLOSE },
-  'u': { type: operations.TABS_REOPEN },
-  'h': { type: operations.TABS_PREV, count: 1 },
-  'l': { type: operations.TABS_NEXT, count: 1 },
-  'r': { type: operations.TABS_RELOAD, cache: false },
-  'R': { type: operations.TABS_RELOAD, cache: true },
-  'zi': { type: operations.ZOOM_IN },
-  'zo': { type: operations.ZOOM_OUT },
-  'zz': { type: operations.ZOOM_NEUTRAL },
-  'f': { type: operations.FOLLOW_START, newTab: false },
-  'F': { type: operations.FOLLOW_START, newTab: true },
-  'H': { type: operations.NAVIGATE_HISTORY_PREV },
-  'L': { type: operations.NAVIGATE_HISTORY_NEXT },
-  '[[': { type: operations.NAVIGATE_LINK_PREV },
-  ']]': { type: operations.NAVIGATE_LINK_NEXT },
-  'gu': { type: operations.NAVIGATE_PARENT },
-  'gU': { type: operations.NAVIGATE_ROOT },
-};
-
 const asKeymapChars = (keys) => {
   return keys.map((k) => {
     let c = String.fromCharCode(k.code);
@@ -58,4 +18,4 @@ const asCaretChars = (keys) => {
   }).join('');
 };
 
-export { defaultKeymap, asKeymapChars, asCaretChars };
+export { asKeymapChars, asCaretChars };
diff --git a/src/content/index.js b/src/content/index.js
index 80acd2d..812fbc5 100644
--- a/src/content/index.js
+++ b/src/content/index.js
@@ -85,9 +85,9 @@ const execOperation = (operation) => {
     return scrolls.scrollTop(window);
   case operations.SCROLL_BOTTOM:
     return scrolls.scrollBottom(window);
-  case operations.SCROLL_LEFT:
+  case operations.SCROLL_HOME:
     return scrolls.scrollLeft(window);
-  case operations.SCROLL_RIGHT:
+  case operations.SCROLL_END:
     return scrolls.scrollRight(window);
   case operations.FOLLOW_START:
     return startFollows(operation.newTab);
diff --git a/src/messages/index.js b/src/messages/index.js
index 4e34436..df9fba2 100644
--- a/src/messages/index.js
+++ b/src/messages/index.js
@@ -8,5 +8,7 @@ export default {
 
   KEYDOWN: 'keydown',
 
-  OPEN_URL: 'open.url'
+  OPEN_URL: 'open.url',
+
+  SETTINGS_RELOAD: 'settings.reload',
 };
diff --git a/src/operations/index.js b/src/operations/index.js
index d6ffc42..b68f59d 100644
--- a/src/operations/index.js
+++ b/src/operations/index.js
@@ -1,17 +1,22 @@
 export default {
   // Command
-  COMMAND_OPEN: 'cmd.open',
-  COMMAND_TABS_OPEN: 'cmd.tabs.open',
-  COMMAND_TABS_NEW: 'cmd.tabs.new',
-  COMMAND_BUFFER: 'cmd.buffer',
+  COMMAND_SHOW: 'command.show',
+  COMMAND_SHOW_OPEN: 'command.show.open',
+  COMMAND_SHOW_TABOPEN: 'command.show.tabopen',
+  COMMAND_SHOW_BUFFER: 'command.show.buffer',
 
+  // Scrolls
   SCROLL_LINES: 'scroll.lines',
   SCROLL_PAGES: 'scroll.pages',
   SCROLL_TOP: 'scroll.top',
   SCROLL_BOTTOM: 'scroll.bottom',
-  SCROLL_LEFT: 'scroll.left',
-  SCROLL_RIGHT: 'scroll.right',
+  SCROLL_HOME: 'scroll.home',
+  SCROLL_END: 'scroll.end',
+
+  // Follows
   FOLLOW_START: 'follow.start',
+
+  // Navigations
   NAVIGATE_HISTORY_PREV: 'navigate.history.prev',
   NAVIGATE_HISTORY_NEXT: 'navigate.history.next',
   NAVIGATE_LINK_PREV: 'navigate.link.prev',
@@ -19,12 +24,14 @@ export default {
   NAVIGATE_PARENT: 'navigate.parent',
   NAVIGATE_ROOT: 'navigate.root',
 
-  // Background
-  TABS_CLOSE: 'tabs.close',
-  TABS_REOPEN: 'tabs.reopen',
-  TABS_PREV: 'tabs.prev',
-  TABS_NEXT: 'tabs.next',
-  TABS_RELOAD: 'tabs.reload',
+  // Tabs
+  TAB_CLOSE: 'tabs.close',
+  TAB_REOPEN: 'tabs.reopen',
+  TAB_PREV: 'tabs.prev',
+  TAB_NEXT: 'tabs.next',
+  TAB_RELOAD: 'tabs.reload',
+
+  // Zooms
   ZOOM_IN: 'zoom.in',
   ZOOM_OUT: 'zoom.out',
   ZOOM_NEUTRAL: 'zoom.neutral',
diff --git a/src/reducers/input.js b/src/reducers/input.js
index eb7ff24..dca26e2 100644
--- a/src/reducers/input.js
+++ b/src/reducers/input.js
@@ -2,6 +2,7 @@ import actions from '../actions';
 
 const defaultState = {
   keys: [],
+  keymaps: {}
 };
 
 export default function reducer(state = defaultState, action = {}) {
@@ -19,6 +20,11 @@ export default function reducer(state = defaultState, action = {}) {
     return Object.assign({}, state, {
       keys: [],
     });
+  case actions.INPUT_SET_KEYMAPS:
+    return Object.assign({}, state, {
+      keymaps: action.keymaps,
+      keys: [],
+    });
   default:
     return state;
   }
diff --git a/src/settings/index.js b/src/settings/index.js
new file mode 100644
index 0000000..2ed060c
--- /dev/null
+++ b/src/settings/index.js
@@ -0,0 +1,22 @@
+import './settings.scss';
+import messages from '../messages';
+
+document.addEventListener('DOMContentLoaded', () => {
+  let form = document.getElementById('vimvixen-settings-form');
+  form.addEventListener('submit', (e) => {
+    e.preventDefault();
+    browser.storage.local.set({
+      settings: {
+        json: e.target.elements['plain-json'].value
+      }
+    }).then(() => {
+      return browser.runtime.sendMessage({
+        type: messages.SETTINGS_RELOAD
+      });
+    });
+  });
+
+  browser.storage.local.get('settings').then((value) => {
+    form.elements['plain-json'].value = value.settings.json;
+  }, console.error);
+});
diff --git a/src/settings/settings.html b/src/settings/settings.html
new file mode 100644
index 0000000..99d6c6b
--- /dev/null
+++ b/src/settings/settings.html
@@ -0,0 +1,18 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset='utf-8'>
+  </head>
+  <body>
+    <h1>Configure</h1>
+
+    <h2>Home page</h2>
+    <form id='vimvixen-settings-form' class='vimvixen-settings-form'>
+      <label for='load-from-json'>Load from JSON:</label>
+      <textarea name='plain-json' spellcheck='false'></textarea>
+
+      <button type='submit'>Save</button>
+    </form>
+    <script src='settings.js'></script>
+  </body>
+</html>
diff --git a/src/settings/settings.scss b/src/settings/settings.scss
new file mode 100644
index 0000000..5707c8a
--- /dev/null
+++ b/src/settings/settings.scss
@@ -0,0 +1,8 @@
+.vimvixen-settings-form {
+  textarea[name=plain-json] {
+    font-family: monospace;
+    width: 100%;
+    min-height: 64ex;
+    resize: vertical;
+  }
+}
diff --git a/webpack.config.js b/webpack.config.js
index ba08975..bf121d1 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -7,6 +7,7 @@ const dist = path.resolve(__dirname, 'build');
 module.exports = {
   entry: {
     index: path.join(src, 'content'),
+    settings: path.join(src, 'settings'),
     background: path.join(src, 'background'),
     console: path.join(src, 'console', 'console.js')
   },
@@ -46,6 +47,11 @@ module.exports = {
       template: path.join(src, 'console', 'console.html'),
       filename: path.join(dist, 'console.html'),
       inject: false
+    }),
+    new HtmlWebpackPlugin({
+      template: path.join(src, 'settings', 'settings.html'),
+      filename: path.join(dist, 'settings.html'),
+      inject: false
     })
   ]
 };