---
syntax: markdown
tags: [tldr, common]
source: https://github.com/tldr-pages/tldr.git
---
# 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`
