More information: Firefox
Firefox originally forked from the defunct "Mozilla browser" in 2004. Firefox also includes in-browser translations and a feature to auto-close cookie banners as of version. Firefox has a vast library of browser plugins, called "Add-ons," and the developer, Mozilla, maintains a website for add-on download.
Firefox serves as the upstream for most Gecko-based browsers, including privacy-hardened forks such as Librewolf and speed-oriented forks like Waterfox. Older Gecko codebase has also spawned hard-forks that no longer explicitly rely on Firefox as an upstream provider such as Pale Moon.
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avoidthehack Recommendation status: Recommended (Linux/macOS | Windows)
Default Firefox still leaves a lot on the table when it comes to privacy. To reach its "true" privacy potential, Firefox must be "hardened" or tweaked: Harden Firefox
Note: Mozilla tracks downloads of Firefox with a unique ID.