The Back/Forward button drop-down arrow marker was removed from Firefox. To get the tab history drop-down list, you can: *right-click the Back/Forward button *HOLD down the left-click mouse button on the Back/Forward button until the list appears (about 1 second) *Add back the drop-down marker by installing this Add-on: https://addons.mozilla.org/en-US/firefox/addon/backforward-dropmarker/ '''If this reply solves your problem, please click "Solved It" next to this reply when <u>signed-in</u> to the forum.''' ------------------------- Not related to your question, but... You need to update some plug-ins: *Plug-in check: https://www-trunk.stage.mozilla.com/en-US/plugincheck/ *Shockwave Flash (Adobe Flash or Flash): [https://support.mozilla.com/en-US/kb/Managing%20the%20Flash%20plugin#w_updating-flash Updating Flash in Firefox] *Next Generation Java Plug-in for Mozilla browsers: [https://support.mozilla.com/en-US/kb/Using%20the%20Java%20plugin%20with%20Firefox#w_installing-or-updating-java Installing or Updating Java in Firefox]