firefox

a free and open source web browser from Mozilla

TLDR

Launch Firefox and open a web page

$ firefox [https://www.duckduckgo.com]

Open a new window

$ firefox --new-window [https://www.duckduckgo.com]

Open a private (incognito) window

$ firefox --private-window

Search for "wikipedia" using the default search engine

$ firefox --search "[wikipedia]"

Launch Firefox in safe mode, with all extensions disabled

$ firefox --safe-mode

Take a screenshot of a web page in headless mode

$ firefox --headless --screenshot [path/to/output_file.png] [https://example.com/]

Use a specific profile to allow multiple separate instances of Firefox to run at once

$ firefox --profile [path/to/directory] [https://example.com/]

Set Firefox as the default browser

$ firefox --setDefaultBrowser

SYNOPSIS

firefox [OPTIONS] [URL]

/usr/lib/firefox/firefox [OPTIONS] [URL]

DESCRIPTION

Firefox is an open-source web browser, designed for standards compliance, performance and portability.

USAGE

If there is an Firefox browser already running, firefox will arrange for it to create a new browser window; otherwise it will start a new instance.

OPTIONS

A summary of the options supported by firefox is included below.

X11 options

--display=DISPLAY: X display to use
--sync: Make X calls synchronous
--no-xshm: Don't use X shared memory extension
--xim-preedit=STYLE
--xim-status=STYLE
--g-fatal-warnings: Make all warnings fatal

Mozilla options

-h, -help: Show summary of options.
-v, -version: Print Firefox version.
-P [profile]: Start with profile. When no profile is given, displays the Profile Manager. May require -no-remote, see below.
-migration: Start with migration wizard. May require -no-remote, see below.
-ProfileManager: Start with profile manager. May require -no-remote, see below.
-no-remote: Don't connect to a running Firefox instance. This option can be necessary in conjunction to several of the options above, that won't have any effect when an Firefox instance is running unless -no-remote is used at the same time.
-UILocale locale: Start with locale resources as User Interface locale. By default, it is guessed from environment and available locales for Firefox.
-safe-mode: Starts Firefox in safe mode, i.e. disabling all extensions and showing a bit more debugging messages.
-jsconsole: Start with Javascript Console
-new-window URL: Open URL in a new window in an already running Firefox process.
-new-tab URL: Open URL in a new tab in an already running Firefox process.
-chrome url: Load the specified chrome.

ENVIRONMENT

MOZILLA_DISABLE_PLUGINS - when set, totally disables loading browser plugins (the ones that appear at the about:plugins url)

FILES

/usr/bin/firefox - symbolic link to /usr/lib/firefox/firefox.

/usr/lib/firefox/firefox - Firefox executable.

/usr/lib/firefox/firefox-bin - Legacy executable.

BUGS

To report a bug, please visit http://bugzilla.mozilla.org/ and/or report bugs to the Debian Bug Tracking System, as usual.

AUTHORS

The Mozilla Organization: http://www.mozilla.org/about.html