Restartless Restart {web link} This 15KB restartless add-on will add a "File" -> "Restart" menu item and a ctrl/cmd + alt + r hotkey to restart Firefox or Seamonkey.

Restart {web link} "Restart" menu and button, with configurable shortcut key.

Restart Button {web link} Restart button for Firefox

See also:

• https://support.mozilla.org/kb/forget-button-quickly-delete-your-browsing-history

There is a "Close Other Tabs" item in the Tab bar context menu. You can set browser.tabs.closeWindowWithLastTab to false on the about:config page to prevent closing the last tab from closing that window and make a close button appear if only one tab is open, so you can close this last tabs as well.

• http://kb.mozillazine.org/about:config

There are various extensions that allow to restart Firefox. You can search the Add-ons website.

• https://addons.mozilla.org/firefox/search/?q=restart