FujiwaraChoki/MoneyPrinterV2 · error · ValueError

Firefox profile path does not exist or is not a directory: {

Error message

Firefox profile path does not exist or is not a directory: {fp_profile_path}

What it means

Raised in AFM.__init__ when the Firefox profile path passed to the browser launcher is not an existing directory. Selenium-Firefox cannot start with a nonexistent profile, so the constructor fails fast before instantiating the driver.

Source

Thrown at src/classes/AFM.py:54

            fp_profile_path (str): The path to the Firefox profile
            twitter_account_uuid (str): The Twitter account UUID
            account_nickname (str): The account nickname
            topic (str): The topic of the product

        Returns:
            None
        """
        self._fp_profile_path: str = fp_profile_path

        # Initialize the Firefox profile
        self.options: Options = Options()

        # Set headless state of browser
        if get_headless():
            self.options.add_argument("--headless")

        if not os.path.isdir(fp_profile_path):
            raise ValueError(
                f"Firefox profile path does not exist or is not a directory: {fp_profile_path}"
            )

        # Set the profile path
        self.options.add_argument("-profile")
        self.options.add_argument(fp_profile_path)

        # Set the service
        self.service: Service = Service(GeckoDriverManager().install())

        # Initialize the browser
        self.browser: webdriver.Firefox = webdriver.Firefox(
            service=self.service, options=self.options
        )

        # Set the affiliate link
        self.affiliate_link: str = affiliate_link

View on GitHub (pinned to 5192af8eca)

Solutions

Verify the path exists: ls <fp_profile_path> and confirm it is a directory
Correct the profile path in config.json or the environment variable supplying it
Use an absolute path (os.path.abspath / Path(...).resolve()) to avoid cwd-dependent resolution
If the profile was deleted, recreate it or point to an existing Firefox profile

Example fix

// before
afm = AFM(fp_profile_path="~/mozilla/firefox/profile", ...)

// after
from pathlib import Path
fp = Path("~/mozilla/firefox/profile").expanduser().resolve()
if not fp.is_dir():
    raise FileNotFoundError(f"Configure a valid Firefox profile at {fp}")
afm = AFM(fp_profile_path=str(fp), ...)

Defensive patterns

Strategy: validation

Validate before calling

from pathlib import Path
fp = Path(fp_profile_path).expanduser().resolve()
if not fp.is_dir():
    raise FileNotFoundError(f"Configure a valid Firefox profile directory: {fp}")
afm = AFM(fp_profile_path=str(fp), ...)

Type guard

from pathlib import Path

def is_valid_profile_dir(p: str) -> bool:
    try:
        return Path(p).expanduser().resolve().is_dir()
    except (OSError, ValueError):
        return False

Prevention

Always expanduser() and resolve() profile paths before passing them in
Add a preflight check (like scripts/preflight_local.py) that validates configured paths on startup
Never rely on relative profile paths; store absolute paths in config.json

When it happens

Trigger: Creating an AFM instance with fp_profile_path pointing to a deleted/moved Firefox profile, a file instead of a directory, a relative path resolved from the wrong cwd, or a path with a typo.

Common situations: Profile directory moved or cleaned up between runs, hardcoded absolute paths in config.json that don't exist on another machine, or running from a different working directory so a relative profile path doesn't resolve.

Related errors

AI-assisted analysis of FujiwaraChoki/MoneyPrinterV2@5192af8eca (2026-08-28). Data as JSON: /api/errors/31af5c767553c8c5. Report an issue: GitHub.