How do I manually check for Mozilla Firefox updates?

At any time, you can check for updates.

1. At the top of the Firefox window click the Help menu and select Check for Updates....On the menu bar click the Help menu and select Check for Updates.... The Software Update window will open.
    
   
   
   • If Check for Updates... is grayed out, see Check for Updates is disabled.
2. If major updates are available, click Get the New Version to begin the update process.
   
    
   • If no updates are available, click FinishDone to close the window.
3. When the updates are ready to install, you must restart Firefox. To restart and install the updates, click Restart Firefox.
   
    

How do I configure update optionspreferences?

You can configure Firefox to automatically check for updates or to disable automatic updating.

1. At the top of the Firefox window, click on the Firefox button (Tools menu in Windows XP) and then click OptionsOn the menu bar, click on the Firefox menu and select Preferences...At the top of the Firefox window, click on the Edit menu and select PreferencesAt the top of the Firefox window, click on the Tools menu and select Options...On the menu bar, click on the Firefox menu and select Preferences...At the top of the Firefox window, click on the Edit menu and select Preferences...
2. Click the Advanced panel.
3. Click the Update tab. The auto-update optionspreferences are displayed.
   
   

    

   
   

4. Update optionspreferences:
   • Automatically check for updates to: Select the things you want Firefox to check. It can check for updates to the Firefox application, any installed add-ons (except for plugins — use the plugin check page to update them) and search engines.
     • To disable automatic checking for updates, deselect all three optionspreferences.
       If you deselect the Firefox optionpreference, you will not receive critical security updates that may keep you safe online unless you frequently do a manual check for updates.
   • When updates to Firefox are found: Choose how you want Firefox to manage any found updates.
     • Ask me what I want to do: Firefox lets you choose if you want to download and install updates. If you do not choose to do so, you can download them at a later time.
     • Automatically download and install the update: Firefox automatically downloads and installs found updates. If you wish to be prompted if the downloads will disable any installed add-ons, select that setting.
   • To review the history of updates that have been downloaded and installed, click Show Update History.
5. Click OK to close the Options window