firefox

-h, --help: Prints the command line options.
-g, --debug: Starts firefox in a debugger.
-d, --debugger: Specify the debugger in which to start firefox. The default is gdb. Used in conjunction with -g.
-a, --debugger-args: Specify arguments to pass to the debugger. Used in conjunction with -g.
-no-remote: Don't connect to any other running instances of firefox. Use this if you want to run firefox in an entirely new process. By default, firefox will delegate a command to an already running instance.
-ProfileManager: Start the profilemanager. Use this to choose the profile you would like to run firefox with. You will need to also use -no-remote if there is already a running firefox instance.
-P profile: Start firefox with the profile named profile. Will start the profile manager if a valid profile name is not specified. You will need to also use -no-remote if there is already a running firefox instance.
-safe-mode: Start firefox in safe-mode. This disables all third-party extensions, and may be necessary if you are having problems with an extension you installed.
-new-tab url: Open url in a new tab.
-new-window url: Open url in a new window.
-v, -version: Print the current version of firefox.
-UILocale locale: Start firefox with the specified locale locale. Use this to override your environment
-preferences: Open the preferences dialog.
-private: Start firefox in private browsing mode
-private-toggle: Toggle private browsing mode
-setDefaultBrowser: Set firefox as the default web browser
-search term: Search for term with your default search engine
-jsconsole: Open the Error console. If firefox is not already running, this will open a new browser window too