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How to get help for Firefox command line parameters

Using Windows 11 and a recent version of Firefox, if I open a command prompt window and enter: C:\Users\Admin\Documents>"C:\Program Files\Mozilla Firefox Esr\firefox.e… (read more)

Using Windows 11 and a recent version of Firefox, if I open a command prompt window and enter: C:\Users\Admin\Documents>"C:\Program Files\Mozilla Firefox Esr\firefox.exe" --help

I get nothing.

But it works if I add "| more": C:\Users\Admin\Documents>"C:\Program Files\Mozilla Firefox Esr\firefox.exe" --help | more Usage: C:\Program Files\Mozilla Firefox Esr\firefox.exe [ options ... ] [URL]

      where options include:
 -h or --help       Print this message.
 -v or --version    Print Firefox version.
 --full-version     Print Firefox version, build and platform build ids.
 -P <profile>       Start with <profile>.
 --profile <path>   Start with profile at <path>.
 --migration        Start with migration wizard.
 --ProfileManager   Start with ProfileManager.
 --origin-to-force-quic-on <origin>
                    Force to use QUIC for the specified origin.
 --new-instance     Open new instance, not a new window in running instance.
 --safe-mode        Disables extensions and themes for this session.
 --allow-downgrade  Allows downgrading a profile.
 --MOZ_LOG=<modules> Treated as MOZ_LOG=<modules> environment variable,
                    overrides it.
 --MOZ_LOG_FILE=<file> Treated as MOZ_LOG_FILE=<file> environment variable,
                    overrides it. If MOZ_LOG_FILE is not specified as an
                    argument or as an environment variable, logging will be
                    written to stdout.
 --console          Start Firefox with a debugging console.
 --headless         Run without a GUI.
 --browser          Open a browser window.
 --new-window <url> Open <url> in a new window.
 --new-tab <url>    Open <url> in a new tab.
 --private-window <url> Open <url> in a new private window.
 --preferences      Open Options dialog.
 --screenshot [<path>] Save screenshot to <path> or in working directory.
 --window-size width[,height] Width and optionally height of screenshot.
 --search <term>    Search <term> with your default search engine.
 --setDefaultBrowser Set this app as the default browser.
 --first-startup    Run post-install actions before opening a new window.
 --kiosk            Start the browser in kiosk mode.
 --kiosk-monitor <num> Place kiosk browser window on given monitor.
 --disable-pinch    Disable touch-screen and touch-pad pinch gestures.
 --jsconsole        Open the Browser Console.
 --devtools         Open DevTools on initial load.
 --jsdebugger [<path>] Open the Browser Toolbox. Defaults to the local build
                    but can be overridden by a firefox path.
 --wait-for-jsdebugger Spin event loop until JS debugger connects.
                    Enables debugging (some) application startup code paths.
                    Only has an effect when `--jsdebugger` is also supplied.
 --start-debugger-server [ws:][ <port> | <path> ] Start the devtools server on
                    a TCP port or Unix domain socket path. Defaults to TCP port
                    6000. Use WebSocket protocol if ws: prefix is specified.
 --marionette       Enable remote control server.
 --remote-debugging-port [<port>] Start the Firefox Remote Agent,
                    which is a low-level remote debugging interface used for WebDriver
                    BiDi and CDP. Defaults to port 9222.
 --remote-allow-hosts <hosts> Values of the Host header to allow for incoming requests.
                    Please read security guidelines at https://firefox-source-docs.mozilla.org/remote/Security.html
 --remote-allow-origins <origins> Values of the Origin header to allow for incoming requests.
                    Please read security guidelines at https://firefox-source-docs.mozilla.org/remote/Security.html
 --remote-allow-system-access Enable privileged access to the application's parent process

Can anyone explain why?

Is it possible to change Firefox so that it works without "| more"?

Note that the above was on my Windows 11 laptop, but I'm sending this from my Windows 7 desktop. None of the suggested topics were appropriate, so I selected the first one "Accessibility".

Open 1 229

Can I temporarily turn off pop-up blocking?

I’m trying to print a mailing label from the US Postal Service website and when I go to print, it says I have a pop-up blocker and I need to disable it in order to print … (read more)

I’m trying to print a mailing label from the US Postal Service website and when I go to print, it says I have a pop-up blocker and I need to disable it in order to print the label. Is it possible to do that?

Open 2 227

Firefox VPN is not showing up in Firefox 149

Hi, I updated to Firefox 149 (German User) and did not get the Seutp prompt mentioned in https://support.mozilla.org/en-US/kb/built-in-vpn#w_turn-on-vpn-in-firefox I Als… (read more)

Hi,

I updated to Firefox 149 (German User) and did not get the Seutp prompt mentioned in https://support.mozilla.org/en-US/kb/built-in-vpn#w_turn-on-vpn-in-firefox I Also tried https://support.mozilla.org/en-US/kb/built-in-vpn#w_how-do-i-turn-off-or-remove-vpn-from-my-toolbar to check the Optiions in the Settings, but there is also the part "VPN" missing. In the Help Section it says that I have installed 149.0 (64-Bit) Windows Version. Is there something missing?

best regards

Open 3 209

Mozilla Account

As a die-hard fan of Mozilla products for many years, I genuinely want to say thank you to the Thunderbird team for keeping such an amazing open-source project alive and … (read more)

As a die-hard fan of Mozilla products for many years, I genuinely want to say thank you to the Thunderbird team for keeping such an amazing open-source project alive and improving it continuously. Thunderbird is still one of the most trusted and powerful email clients ever made, and many of us truly love using it every single day.

But from the bottom of my heart, there is one feature I strongly feel Thunderbird now urgently needs.

Please give Thunderbird a complete Mozilla Account–based sync system, just like Firefox.

Today, whenever we shift to a new computer, we still have to manually:

  • reinstall extensions
  • reconfigure settings
  • restore filters
  • restore signatures
  • adjust preferences again
  • rebuild our personalized setup

For long-time Thunderbird users, this takes a lot of time and effort.

Firefox already gives us such a beautiful and worry-free experience:

  • Install Firefox
  • Login with Mozilla Account
  • Everything comes back automatically

And honestly… that experience feels magical.

As Thunderbird users, we dream of the same simplicity:

  • Install Thunderbird
  • Login with Mozilla Account
  • Extensions auto-install
  • Settings sync automatically
  • Filters & signatures restore instantly
  • Everything feels exactly like our old computer

No stress. No manual setup. No fear of migration.

This is not just a “feature request.” For many loyal Mozilla users, this would be one of the biggest quality-of-life improvements Thunderbird could ever receive.

The Thunderbird team has already discussed this idea publicly for years, which gives users hope that someday it may finally happen.

Please make Thunderbird truly cloud-connected and worry-free for the next generation of users.

Many of us are not just users of Mozilla products — we are emotionally connected to them. ❤

Open 1 129