Where is the Firefox file?

The Firefox profile folder, which contains your user data such as bookmarks, passWords, and extensions, can typically be found in the following locations:

• On Windows: C:\Users\<YourUsername>\AppData\Roaming\Mozilla\Firefox\Profiles\
• On macOS: ~/Library/Application Support/Firefox/Profiles/
• On Linux: ~/.mozilla/firefox/

Each profile will be in a folder named with a random string followed by .default or another identifier if you have multiple profiles.