Flask-NoFLoC

Flask-NoFLoC is a Flask extension which disables FLoC by adding the header

Permissions-Policy: interest-cohort=()

to each HTTP response of your app. Documentation

Examples

To set it up, follow the usual Flask extension setup, either directly:

from flask import Flask
from flask_nofloc import NoFLoC

app = Flask(__name__)
NoFLoC(app)

or using the init_app-paradigm:

# extensions.py
from flask_noflock import NoFLoC

nofloc = NoFLoC()


# app.py
from flask import Flask
from extensions import nofloc

def create_app(settings):
    app = Flask('myapp')

    nofloc.init_app(app)

    return app

If you only want to exclude specific route, you can use a decorator:

from flask_nofloc import add_nofloc_header

@app.route('/nofloc')
@add_nofloc_header
def no_floc():
    return 'no FLoC'

Installation

Install via pip and your favorite installation method:

pip install Flask-NoFLoC

Background

For some background on FLoC, here is a list of related links:

• Technical background: https://web.dev/floc/
• Specification: https://github.com/WICG/floc / https://wicg.github.io/floc/
• An implementation of SimHash: https://github.com/hybridtheory/floc-simhash
• Critique on FLoC: https://www.eff.org/deeplinks/2021/03/googles-floc-terrible-idea
• How to opt out: https://paramdeo.com/blog/opting-your-website-out-of-googles-floc-network
• Browser coverage: https://www.theverge.com/2021/4/16/22387492/google-floc-ad-tech-privacy-browsers-brave-vivaldi-edge-mozilla-chrome-safari

Alternatives

Came here for Django? Check out django-nofloc.