diff --git a/src/content/actions/operation.ts b/src/content/actions/operation.ts
index f65d0bd..b264e36 100644
--- a/src/content/actions/operation.ts
+++ b/src/content/actions/operation.ts
@@ -1,7 +1,6 @@
 import * as operations from '../../shared/operations';
 import * as actions from './index';
 import * as messages from '../../shared/messages';
-import * as scrolls from '../scrolls';
 import * as navigates from '../navigates';
 import * as focuses from '../focuses';
 import * as urls from '../urls';
@@ -10,9 +9,11 @@ import * as markActions from './mark';
 
 import AddonEnabledUseCase from '../usecases/AddonEnabledUseCase';
 import { SettingRepositoryImpl } from '../repositories/SettingRepository';
+import { ScrollPresenterImpl } from '../presenters/ScrollPresenter';
 
 let addonEnabledUseCase = new AddonEnabledUseCase();
 let settingRepository = new SettingRepositoryImpl();
+let scrollPresenter = new ScrollPresenterImpl();
 
 // eslint-disable-next-line complexity, max-lines-per-function
 const exec = async(
@@ -41,25 +42,25 @@ const exec = async(
     }), '*');
     break;
   case operations.SCROLL_VERTICALLY:
-    scrolls.scrollVertically(operation.count, smoothscroll);
+    scrollPresenter.scrollVertically(operation.count, smoothscroll);
     break;
   case operations.SCROLL_HORIZONALLY:
-    scrolls.scrollHorizonally(operation.count, smoothscroll);
+    scrollPresenter.scrollHorizonally(operation.count, smoothscroll);
     break;
   case operations.SCROLL_PAGES:
-    scrolls.scrollPages(operation.count, smoothscroll);
+    scrollPresenter.scrollPages(operation.count, smoothscroll);
     break;
   case operations.SCROLL_TOP:
-    scrolls.scrollToTop(smoothscroll);
+    scrollPresenter.scrollToTop(smoothscroll);
     break;
   case operations.SCROLL_BOTTOM:
-    scrolls.scrollToBottom(smoothscroll);
+    scrollPresenter.scrollToBottom(smoothscroll);
     break;
   case operations.SCROLL_HOME:
-    scrolls.scrollToHome(smoothscroll);
+    scrollPresenter.scrollToHome(smoothscroll);
     break;
   case operations.SCROLL_END:
-    scrolls.scrollToEnd(smoothscroll);
+    scrollPresenter.scrollToEnd(smoothscroll);
     break;
   case operations.FOLLOW_START:
     window.top.postMessage(JSON.stringify({
diff --git a/src/content/components/common/mark.ts b/src/content/components/common/mark.ts
index 77aa15d..ddd1a38 100644
--- a/src/content/components/common/mark.ts
+++ b/src/content/components/common/mark.ts
@@ -1,12 +1,13 @@
 import * as markActions from '../../actions/mark';
-import * as scrolls from '../..//scrolls';
 import * as consoleFrames from '../..//console-frames';
 import * as keyUtils from '../../../shared/utils/keys';
 import Mark from '../../Mark';
 
 import { SettingRepositoryImpl } from '../../repositories/SettingRepository';
+import { ScrollPresenterImpl } from '../../presenters/ScrollPresenter';
 
 let settingRepository = new SettingRepositoryImpl();
+let scrollPresenter = new ScrollPresenterImpl();
 
 const cancelKey = (key: keyUtils.Key): boolean => {
   return key.key === 'Esc' || key.key === '[' && Boolean(key.ctrlKey);
@@ -54,7 +55,7 @@ export default class MarkComponent {
   }
 
   doSet(key: keyUtils.Key) {
-    let { x, y } = scrolls.getScroll();
+    let { x, y } = scrollPresenter.getScroll();
     this.store.dispatch(markActions.setLocal(key.key, x, y));
   }
 
@@ -69,11 +70,11 @@ export default class MarkComponent {
     }
 
     let { x, y } = marks[key.key];
-    scrolls.scrollTo(x, y, smoothscroll);
+    scrollPresenter.scrollTo(x, y, smoothscroll);
   }
 
   doSetGlobal(key: keyUtils.Key) {
-    let { x, y } = scrolls.getScroll();
+    let { x, y } = scrollPresenter.getScroll();
     this.store.dispatch(markActions.setGlobal(key.key, x, y));
   }
 
diff --git a/src/content/components/top-content/index.ts b/src/content/components/top-content/index.ts
index b9ef2dd..de14b3f 100644
--- a/src/content/components/top-content/index.ts
+++ b/src/content/components/top-content/index.ts
@@ -4,10 +4,11 @@ import FindComponent from './find';
 import * as consoleFrames from '../../console-frames';
 import * as messages from '../../../shared/messages';
 import MessageListener from '../../MessageListener';
-import * as scrolls from '../../scrolls';
 import AddonEnabledUseCase from '../../usecases/AddonEnabledUseCase';
+import { ScrollPresenterImpl } from '../../presenters/ScrollPresenter';
 
 let addonEnabledUseCase = new AddonEnabledUseCase();
+let scrollPresenter = new ScrollPresenterImpl();
 
 export default class TopContent {
   private win: Window;
@@ -42,7 +43,7 @@ export default class TopContent {
     case messages.ADDON_ENABLED_QUERY:
       return Promise.resolve(addonEnabled);
     case messages.TAB_SCROLL_TO:
-      return scrolls.scrollTo(message.x, message.y, false);
+      return scrollPresenter.scrollTo(message.x, message.y, false);
     }
   }
 }
diff --git a/src/content/presenters/FindPresenter.ts b/src/content/presenters/FindPresenter.ts
index 6dd03f8..d9bc835 100644
--- a/src/content/presenters/FindPresenter.ts
+++ b/src/content/presenters/FindPresenter.ts
@@ -1,4 +1,3 @@
-import ConsoleClient, { ConsoleClientImpl } from '../client/ConsoleClient';
 
 export default interface FindPresenter {
   find(keyword: string, backwards: boolean): boolean;
@@ -28,12 +27,6 @@ interface MyWindow extends Window {
 declare var window: MyWindow;
 
 export class FindPresenterImpl implements FindPresenter {
-  private consoleClient: ConsoleClient;
-
-  constructor({ consoleClient = new ConsoleClientImpl() } = {}) {
-    this.consoleClient = consoleClient;
-  }
-
   find(keyword: string, backwards: boolean): boolean {
     let caseSensitive = false;
     let wrapScan = true;
diff --git a/src/content/scrolls.ts b/src/content/presenters/ScrollPresenter.ts
similarity index 50%
rename from src/content/scrolls.ts
rename to src/content/presenters/ScrollPresenter.ts
index 6a35315..9f47394 100644
--- a/src/content/scrolls.ts
+++ b/src/content/presenters/ScrollPresenter.ts
@@ -1,4 +1,4 @@
-import * as doms from '../shared/utils/dom';
+import * as doms from '../../shared/utils/dom';
 
 const SCROLL_DELTA_X = 64;
 const SCROLL_DELTA_Y = 64;
@@ -94,75 +94,86 @@ class Scroller {
   }
 }
 
-const getScroll = () => {
-  let target = scrollTarget();
-  return { x: target.scrollLeft, y: target.scrollTop };
-};
+type Point = { x: number, y: number };
+
+export default interface ScrollPresenter {
+  getScroll(): Point;
+  scrollVertically(amount: number, smooth: boolean): void;
+  scrollHorizonally(amount: number, smooth: boolean): void;
+  scrollPages(amount: number, smooth: boolean): void;
+  scrollTo(x: number, y: number, smooth: boolean): void;
+  scrollToTop(smooth: boolean): void;
+  scrollToBottom(smooth: boolean): void;
+  scrollToHome(smooth: boolean): void;
+  scrollToEnd(smooth: boolean): void;
+
+  // eslint-disable-next-line semi
+}
 
-const scrollVertically = (count: number, smooth: boolean): void => {
-  let target = scrollTarget();
-  let delta = SCROLL_DELTA_Y * count;
-  if (scrolling) {
-    delta = SCROLL_DELTA_Y * count * 4;
+export class ScrollPresenterImpl {
+  getScroll(): Point {
+    let target = scrollTarget();
+    return { x: target.scrollLeft, y: target.scrollTop };
   }
-  new Scroller(target, smooth).scrollBy(0, delta);
-};
 
-const scrollHorizonally = (count: number, smooth: boolean): void => {
-  let target = scrollTarget();
-  let delta = SCROLL_DELTA_X * count;
-  if (scrolling) {
-    delta = SCROLL_DELTA_X * count * 4;
+  scrollVertically(count: number, smooth: boolean): void {
+    let target = scrollTarget();
+    let delta = SCROLL_DELTA_Y * count;
+    if (scrolling) {
+      delta = SCROLL_DELTA_Y * count * 4;
+    }
+    new Scroller(target, smooth).scrollBy(0, delta);
   }
-  new Scroller(target, smooth).scrollBy(delta, 0);
-};
 
-const scrollPages = (count: number, smooth: boolean): void => {
-  let target = scrollTarget();
-  let height = target.clientHeight;
-  let delta = height * count;
-  if (scrolling) {
-    delta = height * count;
+  scrollHorizonally(count: number, smooth: boolean): void {
+    let target = scrollTarget();
+    let delta = SCROLL_DELTA_X * count;
+    if (scrolling) {
+      delta = SCROLL_DELTA_X * count * 4;
+    }
+    new Scroller(target, smooth).scrollBy(delta, 0);
   }
-  new Scroller(target, smooth).scrollBy(0, delta);
-};
 
-const scrollTo = (x: number, y: number, smooth: boolean): void => {
-  let target = scrollTarget();
-  new Scroller(target, smooth).scrollTo(x, y);
-};
+  scrollPages(count: number, smooth: boolean): void {
+    let target = scrollTarget();
+    let height = target.clientHeight;
+    let delta = height * count;
+    if (scrolling) {
+      delta = height * count;
+    }
+    new Scroller(target, smooth).scrollBy(0, delta);
+  }
 
-const scrollToTop = (smooth: boolean): void => {
-  let target = scrollTarget();
-  let x = target.scrollLeft;
-  let y = 0;
-  new Scroller(target, smooth).scrollTo(x, y);
-};
+  scrollTo(x: number, y: number, smooth: boolean): void {
+    let target = scrollTarget();
+    new Scroller(target, smooth).scrollTo(x, y);
+  }
 
-const scrollToBottom = (smooth: boolean): void => {
-  let target = scrollTarget();
-  let x = target.scrollLeft;
-  let y = target.scrollHeight;
-  new Scroller(target, smooth).scrollTo(x, y);
-};
+  scrollToTop(smooth: boolean): void {
+    let target = scrollTarget();
+    let x = target.scrollLeft;
+    let y = 0;
+    new Scroller(target, smooth).scrollTo(x, y);
+  }
 
-const scrollToHome = (smooth: boolean): void => {
-  let target = scrollTarget();
-  let x = 0;
-  let y = target.scrollTop;
-  new Scroller(target, smooth).scrollTo(x, y);
-};
+  scrollToBottom(smooth: boolean): void {
+    let target = scrollTarget();
+    let x = target.scrollLeft;
+    let y = target.scrollHeight;
+    new Scroller(target, smooth).scrollTo(x, y);
+  }
 
-const scrollToEnd = (smooth: boolean): void => {
-  let target = scrollTarget();
-  let x = target.scrollWidth;
-  let y = target.scrollTop;
-  new Scroller(target, smooth).scrollTo(x, y);
-};
+  scrollToHome(smooth: boolean): void {
+    let target = scrollTarget();
+    let x = 0;
+    let y = target.scrollTop;
+    new Scroller(target, smooth).scrollTo(x, y);
+  }
 
-export {
-  getScroll,
-  scrollVertically, scrollHorizonally, scrollPages,
-  scrollTo,
-  scrollToTop, scrollToBottom, scrollToHome, scrollToEnd
-};
+  scrollToEnd(smooth: boolean): void {
+    let target = scrollTarget();
+    let x = target.scrollWidth;
+    let y = target.scrollTop;
+    new Scroller(target, smooth).scrollTo(x, y);
+  }
+}