diff --git a/README.md b/README.md
index 9d08d33..5c9c5e0 100644
--- a/README.md
+++ b/README.md
@@ -85,10 +85,18 @@ To adjust the search engine default and add/remove search engines, see the [sear
 
 Open a URL or search keywords by search engine in new tab.
 
-#### `:q` command
+#### `:quit` command
 
 Close the current tab.
 
+#### `:bdelete` command
+
+Close a certain tab.
+
+#### `:bdeletes` command
+
+Close tabs matches with keywords.
+
 #### `:winopen` command
 
 Open a URL or search keywords by search engine in new window.
diff --git a/src/background/actions/command.js b/src/background/actions/command.js
index 2b77507..39e880d 100644
--- a/src/background/actions/command.js
+++ b/src/background/actions/command.js
@@ -68,6 +68,7 @@ const setCommand = (args) => {
   };
 };
 
+// eslint-disable-next-line complexity
 const exec = (tab, line, settings) => {
   let [name, args] = parsers.parseCommandLine(line);
 
@@ -84,6 +85,18 @@ const exec = (tab, line, settings) => {
   case 'b':
   case 'buffer':
     return bufferCommand(args);
+  case 'bd':
+  case 'bdel':
+  case 'bdelete':
+    return tabs.closeTabByKeywords(args.join(' '));
+  case 'bd!':
+  case 'bdel!':
+  case 'bdelete!':
+    return tabs.closeTabByKeywordsForce(args.join(' '));
+  case 'bdeletes':
+    return tabs.closeTabsByKeywords(args.join(' '));
+  case 'bdeletes!':
+    return tabs.closeTabsByKeywordsForce(args.join(' '));
   case 'addbookmark':
     return addBookmarkCommand(tab, args).then((item) => {
       if (!item) {
diff --git a/src/background/shared/completions/index.js b/src/background/shared/completions/index.js
index 8ecdcfc..728cee7 100644
--- a/src/background/shared/completions/index.js
+++ b/src/background/shared/completions/index.js
@@ -65,6 +65,25 @@ const getOpenCompletions = (command, keywords, searchConfig) => {
   });
 };
 
+const getBufferCompletions = (command, keywords, excludePinned) => {
+  return tabs.getCompletions(keywords, excludePinned).then((got) => {
+    let items = got.map((tab) => {
+      return {
+        caption: tab.title,
+        content: command + ' ' + tab.title,
+        url: tab.url,
+        icon: tab.favIconUrl
+      };
+    });
+    return [
+      {
+        name: 'Buffers',
+        items: items
+      }
+    ];
+  });
+};
+
 const getCompletions = (line, settings) => {
   let typedWords = line.trim().split(/ +/);
   let typing = '';
@@ -88,22 +107,17 @@ const getCompletions = (line, settings) => {
     return getOpenCompletions(name, keywords, settings.search);
   case 'b':
   case 'buffer':
-    return tabs.getCompletions(keywords).then((gotTabs) => {
-      let items = gotTabs.map((tab) => {
-        return {
-          caption: tab.title,
-          content: name + ' ' + tab.title,
-          url: tab.url,
-          icon: tab.favIconUrl
-        };
-      });
-      return [
-        {
-          name: 'Buffers',
-          items: items
-        }
-      ];
-    });
+    return getBufferCompletions(name, keywords, false);
+  case 'bd!':
+  case 'bdel!':
+  case 'bdelete!':
+  case 'bdeletes!':
+    return getBufferCompletions(name, keywords, false);
+  case 'bd':
+  case 'bdel':
+  case 'bdelete':
+  case 'bdeletes':
+    return getBufferCompletions(name, keywords, true);
   }
   return Promise.resolve([]);
 };
diff --git a/src/background/shared/completions/tabs.js b/src/background/shared/completions/tabs.js
index 5edddca..8c0f1f9 100644
--- a/src/background/shared/completions/tabs.js
+++ b/src/background/shared/completions/tabs.js
@@ -1,7 +1,9 @@
-const getCompletions = (keyword) => {
+const getCompletions = (keyword, excludePinned) => {
   return browser.tabs.query({ currentWindow: true }).then((tabs) => {
     let matched = tabs.filter((t) => {
       return t.url.includes(keyword) || t.title && t.title.includes(keyword);
+    }).filter((t) => {
+      return !(excludePinned && t.pinned);
     });
     return matched;
   });
diff --git a/src/background/shared/tabs.js b/src/background/shared/tabs.js
index f1dcc73..d09f676 100644
--- a/src/background/shared/tabs.js
+++ b/src/background/shared/tabs.js
@@ -1,3 +1,5 @@
+import * as tabCompletions from './completions/tabs';
+
 const closeTab = (id) => {
   return browser.tabs.get(id).then((tab) => {
     if (!tab.pinned) {
@@ -10,6 +12,50 @@ const closeTabForce = (id) => {
   return browser.tabs.remove(id);
 };
 
+const closeTabByKeywords = (keyword) => {
+  return browser.tabs.query({ currentWindow: true }).then((tabs) => {
+    let matched = tabs.filter((t) => {
+      return t.url.includes(keyword) || t.title.includes(keyword);
+    }).filter(t => !t.pinned);
+
+    if (matched.length === 0) {
+      throw new Error('No matching buffer for ' + keyword);
+    } else if (matched.length > 1) {
+      throw new Error('More than one match for ' + keyword);
+    }
+    browser.tabs.remove(matched[0].id);
+  });
+};
+
+const closeTabByKeywordsForce = (keyword) => {
+  return browser.tabs.query({ currentWindow: true }).then((tabs) => {
+    let matched = tabs.filter((t) => {
+      return t.url.includes(keyword) || t.title.includes(keyword);
+    });
+
+    if (matched.length === 0) {
+      throw new Error('No matching buffer for ' + keyword);
+    } else if (matched.length > 1) {
+      throw new Error('More than one match for ' + keyword);
+    }
+    browser.tabs.remove(matched[0].id);
+  });
+};
+
+
+const closeTabsByKeywords = (keyword) => {
+  tabCompletions.getCompletions(keyword).then((tabs) => {
+    let tabs2 = tabs.filter(tab => !tab.pinned);
+    browser.tabs.remove(tabs2.map(tab => tab.id));
+  });
+};
+
+const closeTabsByKeywordsForce = (keyword) => {
+  tabCompletions.getCompletions(keyword).then((tabs) => {
+    browser.tabs.remove(tabs.map(tab => tab.id));
+  });
+};
+
 const reopenTab = () => {
   return browser.sessions.getRecentlyClosed({
     maxResults: 1
@@ -119,7 +165,9 @@ const duplicate = (id) => {
 };
 
 export {
-  closeTab, closeTabForce, reopenTab, selectAt, selectByKeyword,
+  closeTab, closeTabForce, closeTabByKeywords, closeTabByKeywordsForce,
+  closeTabsByKeywords, closeTabsByKeywordsForce,
+  reopenTab, selectAt, selectByKeyword,
   selectPrevTab, selectNextTab, selectFirstTab,
   selectLastTab, selectTab, reload, updateTabPinned,
   toggleTabPinned, duplicate