diff --git a/manifest.json b/manifest.json
index 0d8003e..a25aacc 100644
--- a/manifest.json
+++ b/manifest.json
@@ -34,7 +34,8 @@
     "clipboardRead",
     "notifications",
     "bookmarks",
-    "browserSettings"
+    "browserSettings",
+	"proxy"
   ],
   "web_accessible_resources": [
     "build/console.html",
diff --git a/src/background/controllers/CommandController.ts b/src/background/controllers/CommandController.ts
index 11fed01..d3697b1 100644
--- a/src/background/controllers/CommandController.ts
+++ b/src/background/controllers/CommandController.ts
@@ -47,6 +47,8 @@ export default class CommandController {
       return this.completionsUseCase.queryBdeleteForce(name, keywords);
     case 'set':
       return this.completionsUseCase.querySet(name, keywords);
+    case 'proxy':
+      return this.completionsUseCase.queryProxy(name, keywords);
     }
     return Promise.resolve([]);
   }
@@ -99,6 +101,8 @@ export default class CommandController {
     case 'h':
     case 'help':
       return this.commandIndicator.help();
+    case 'proxy':
+      return this.commandIndicator.proxy(keywords);
     }
     throw new Error(words[0] + ' command is not defined');
   }
diff --git a/src/background/domains/CommandDocs.ts b/src/background/domains/CommandDocs.ts
index e926851..8a1ad44 100644
--- a/src/background/domains/CommandDocs.ts
+++ b/src/background/domains/CommandDocs.ts
@@ -9,4 +9,5 @@ export default {
   quit: 'Close the current tab',
   quitall: 'Close all tabs',
   help: 'Open Vim Vixen help in new tab',
+  proxy: 'Set a proxy'
 } as {[key: string]: string};
diff --git a/src/background/repositories/BrowserSettingRepository.ts b/src/background/repositories/BrowserSettingRepository.ts
index 9cfb35e..739cd9c 100644
--- a/src/background/repositories/BrowserSettingRepository.ts
+++ b/src/background/repositories/BrowserSettingRepository.ts
@@ -17,6 +17,17 @@ declare namespace browser.browserSettings.homepageOverride {
   function get(param: object): Promise<BrowserSettings>;
 }
 
+declare namespace browser.proxy.settings {
+
+  type BrowserSettings = {
+    value: string;
+  };
+
+  function get(param: object): Promise<BrowserSettings>;
+  function set(param: object): Promise<any>;
+  function clear(param: object): Promise<any>;
+}
+
 @injectable()
 export default class BrowserSettingRepository {
   async getHomepageUrls(): Promise<string[]> {
@@ -24,3 +35,25 @@ export default class BrowserSettingRepository {
     return value.split('|').map(urls.normalizeUrl);
   }
 }
+
+export class ProxyRepository {
+  private clearProxySettings(): Promise<any>{
+    return browser.proxy.settings.clear({});
+  }
+
+  private setProxySettings(address: string): Promise<any>{
+    return browser.proxy.settings.set({value: {
+      proxyType: "manual",
+      http: address,
+      httpProxyAll: true
+    }});
+  }
+
+  set(address: string): Promise<any> {
+    if( address.toLowerCase() == 'none' ){
+      return this.clearProxySettings();
+    }
+    return this.setProxySettings(address);
+  }
+}
+
diff --git a/src/background/usecases/CommandUseCase.ts b/src/background/usecases/CommandUseCase.ts
index d757215..70a953f 100644
--- a/src/background/usecases/CommandUseCase.ts
+++ b/src/background/usecases/CommandUseCase.ts
@@ -10,6 +10,7 @@ import BookmarkRepository from '../repositories/BookmarkRepository';
 import ConsoleClient from '../infrastructures/ConsoleClient';
 import ContentMessageClient from '../infrastructures/ContentMessageClient';
 import RepeatUseCase from '../usecases/RepeatUseCase';
+import { ProxyRepository } from '../repositories/BrowserSettingRepository';
 
 @injectable()
 export default class CommandIndicator {
@@ -22,6 +23,7 @@ export default class CommandIndicator {
     private consoleClient: ConsoleClient,
     private contentMessageClient: ContentMessageClient,
     private repeatUseCase: RepeatUseCase,
+    private proxyRepository: ProxyRepository,
   ) {
   }
 
@@ -142,6 +144,13 @@ export default class CommandIndicator {
     return this.helpPresenter.open();
   }
 
+  async proxy(keywords: string): Promise<any> {
+    if (keywords.length === 0) {
+      return this.proxyRepository.set('none');
+    }
+    return this.proxyRepository.set(keywords);
+  }
+
   private async urlOrSearch(keywords: string): Promise<any> {
     let settings = await this.settingRepository.get();
     return urls.searchUrl(keywords, settings.search);
diff --git a/src/background/usecases/CompletionsUseCase.ts b/src/background/usecases/CompletionsUseCase.ts
index bfff1e6..e81c41c 100644
--- a/src/background/usecases/CompletionsUseCase.ts
+++ b/src/background/usecases/CompletionsUseCase.ts
@@ -217,4 +217,36 @@ export default class CompletionsUseCase {
         url: page.url
       }));
   }
+
+  async queryProxyItems(name: string, keywords: string) {
+    let proxies = [{
+        caption: "burp",
+        url: "127.0.0.1:8080"
+      },{
+        caption: "none",
+        url: "none"
+      } ].filter(proxy=>{
+        if( keywords == '' ){ return true; }
+        if( proxy.caption.startsWith(keywords) ){ return true; }
+        if( proxy.url.startsWith(keywords) ){ return true; }
+        return false;
+      });
+      return proxies;
+      return proxies.map(proxy => ({
+        caption: proxy.caption,
+        content: name + ' ' + proxy.url,
+        url: proxy.url
+      }));
+  }
+
+  async queryProxy(name: string, keywords: string): Promise<CompletionGroup[]> {
+    let groups: CompletionGroup[] = [];
+    let items = await this.queryProxyItems( name, keywords );
+    groups.push({
+      name: 'Saved Proxies',
+      items: items
+    });
+
+    return groups;
+  }
 }
diff --git a/src/shared/settings/Settings.ts b/src/shared/settings/Settings.ts
index 97dda7f..2c01551 100644
--- a/src/shared/settings/Settings.ts
+++ b/src/shared/settings/Settings.ts
@@ -9,6 +9,7 @@ import validate from './validate';
 export type SettingsJSON = {
   keymaps?: KeymapsJSON,
   search?: SearchJSON,
+  //proxies?: ProxiesJSON,
   properties?: PropertiesJSON,
   blacklist?: BlacklistJSON,
 };
@@ -162,5 +163,10 @@ export const DefaultSettingJSONText = `{
   ]
 }`;
 
+  //"proxies": {
+  //  "burp": "127.0.0.1:8080",
+  //  "none": "none"
+  //},
+
 export const DefaultSetting: Settings =
   Settings.fromJSON(JSON.parse(DefaultSettingJSONText));