tldr/pages/common/firefox.md

firefox

A free and open source web browser. More information: https://developer.mozilla.org/en-US/docs/Mozilla/Command_Line_Options.

• 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