* Windows XP/Vista/7/8 – “%APPDATA%\Mozilla\“
* Unix/Linux – “~/.mozilla/“
* Mac OS X – “~/Library/Mozilla/” or “~/Library/Application Support/“

You can enable or disable automatic updates in Firefox with these steps. --From Firefox Menus-- Select the Menu button in the upper-right corner, then choose “Options“. Select “Advanced“. Choose the “Update” tab. Select on of the following options as desired: Automatically install updates Check for updates, but let me choose whether to install them Never check for updates --From about:config Menu-- Type “about:config” in the address bar, then press “Enter“. Search for the “app.update.auto” setting. Double-click the “app.update.auto” option to toggle the setting. If set to “true“, automatic updates are enabled. If set to “false“, automatic updates are disabled. --Via prefs.js file-- Close Firefox. Navigate to the following location based on your operating system. * Windows XP/Vista/7/8 – “%APPDATA%\Mozilla\“ * Unix/Linux – “~/.mozilla/“ * Mac OS X – “~/Library/Mozilla/” or “~/Library/Application Support/“ Open the “Profiles” folder. Open the folder that represents the profile you would like to edit. The name of the folder will vary. It is usually a bunch of characters, followed by “.default”. Open the prefs.js file with a text editor like Notepad. Look for a line that contains “app.update.enabled”. If it doesn’t exist, add a line for it in the file and set it as desired using these examples: user_pref(“app.update.enabled”, true); = Automatic updates enabled user_pref(“app.update.enabled”, false); = Automatic updates disabled REF:[http://www.technipages.com/enable-disable-automatic-updates-in-firefox link1] [http://www.ghacks.net/2015/07/13/what-you-need-to-do-if-firefox-is-not-updating-anymore-automatically/ link2]