Block sites outside container

Block sites outside container

Set up domains so that they aren't allowed to load content except in specific containers.

  • Block sites outside container
  • Block sites outside container
What is Block sites outside container?
Block sites outside container is a companion add-on for Firefox Multi-Account Containers that allows you to block content from specific domains outside designated containers, increasing privacy and preventing cross-container tracking.
Merlin
Stats
Users: 35 ▼ -1
Rating: 4.67 (9)
Version: 1.5.5 (Last updated: 2019-05-29)
Creation date: 2018-10-14
Weekly download count: 1
Firefox on Android: No
Risk impact: High risk impact
Risk likelihood: Low risk likelihood
Manifest version: 2
Permissions:
  • <all_urls>
  • contextualIdentities
  • cookies
  • storage
  • tabs
  • webRequest
  • webRequestBlocking
Size: 21.60K
URLs: Website
Stats date:

Other platforms

Not available on Chrome
Not available on Edge
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Merlin
Summary

This is a companion add-on for Firefox Multi-Account Containers which goes a step further and allows you to block all content for specific sites from loading except in their designated containers. That way, blocked sites that are embedded in sites loaded in other containers (e.g. Facebook "Like" buttons, Twitter buttons, etc.) cannot see what you are doing outside their containers.

Another issue this solves is that althought Multi-Account Containers allows you to specify that a site should always open in a specific container, it does not work if you want to use that site in multiple containers, for example, to manage multiple accounts. With this extension, when a site is blocked, you can choose from multiple containers to load the site in.

User reviews
I have been looking for an extension that does something like this for months! It even works with sites with subdomains like Tumblr, Bandcamp, and NewGrounds.
by Icaru52, 2024-02-20
View all user reviews
Safety
Risk impact

Block sites outside container is risky to use as it requires a number of sensitive permissions that can potentially harm your browser and steal your data. Exercise caution when installing this add-on. Review carefully before installing. We recommend that you only install Block sites outside container if you trust the publisher.

Risk likelihood

Block sites outside container has earned a fairly good reputation and likely can be trusted.

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