Firefox Browser Add-ons
  • Extensions
  • Themes
    • for Firefox
    • Dictionaries & Language Packs
    • Other Browser Sites
    • Add-ons for Android
Log in
Preview of First Party Isolation

First Party Isolation by freddyb

This add-on enables the First Party isolation pref. Clicking the Fishbowl icon temporarily disables it.

ExperimentalExperimental
4.1 (43 reviews)4.1 (43 reviews)
1,521 Users1,521 Users
You’ll need Firefox to use this extension
Download Firefox and get the extension
Download file

Extension Metadata

About this extension
This add-on enables First Party isolation. Clicking the Fishbowl icon or removing the add-on disables it again.

First Party Isolation, also known as Cross-Origin Identifier Unlinkability is a concept from the Tor Browser. The idea is to key every source of browser identification with the domain in the URL bar (the first party). This makes all access to identifiers distinct between usage in the website itself and through third-party. Think of it as blocking Third-party cookies, but more exhaustively. Here are Firefox's implementation details about First Party Isolation.
Rated 4.1 by 43 reviewers
Sign in to rate this extension
There are no ratings yet

Star rating saved

5
28
4
5
3
4
2
0
1
6
Read all 43 reviews
Permissions and dataLearn more

Required permissions:

  • Read and modify privacy settings
More information
Add-on Links
  • Homepage
  • Support site
Version
1.4.0
Size
109.46 KB
Last updated
5 years ago (Jan 14, 2021)
Related Categories
  • Privacy & Security
License
Mozilla Public License 2.0
Version History
  • See all versions
Add to collection
Report this add-on
Release notes for 1.4.0
Compatibility with Firefox 85 and above when dFPI is enabled.
More extensions by freddyb
  • There are no ratings yet

  • There are no ratings yet

  • There are no ratings yet

  • There are no ratings yet

  • There are no ratings yet

  • There are no ratings yet

Go to Mozilla’s homepage

Add-ons

  • About
  • Firefox Add-ons Blog
  • Extension Workshop
  • Developer Hub
  • Developer Policies
  • Community Blog
  • Forum
  • Report a bug
  • Review Guide

Browsers

  • Desktop
  • Mobile
  • Enterprise

Products

  • Browsers
  • VPN
  • Relay
  • Monitor
  • Pocket
  • Bluesky (@firefox.com)
  • Instagram (Firefox)
  • YouTube (firefoxchannel)
  • Privacy
  • Cookies
  • Legal

Except where otherwise noted, content on this site is licensed under the Creative Commons Attribution Share-Alike License v3.0 or any later version.