List of request blocking software

hrj edited this page Feb 14, 2015 · 20 revisions
Name Used with Switchboard ✶ Embed Filtering ✝ Active as of Q1 2015
uMatrix Chromium
uBlock Chromium
NoScript Firefox
RequestPolicyContinued Firefox
Policeman Firefox

Known Limitations


  • From issue #93 it seems that requests made on browser start, before the extension has loaded, are not blockable.
  • From the comments in issue #95, it seems that "webSockets, update-related and web store-related" requests are not blockable.
  • From the comments in #98, behind-the-scenes requests are enabled by default, and disabling them will break important functionality in the browser. B-T-S requests include those used for installing & updating extensions, requests made by extensions, and hyper-link auditing requests.

✶ Switchboard

The name for the concept comes from the name of the HTTP-SwitchBoard extension (predecessor to uMatrix).

The extensions which have a switchboard like interface enable the user to block requests based on the request's domain name, the primary frame's domain-name, and also the type of request.

In contrast, extensions like NoScript have a global switch. If I allow scripts from, they are enabled on all domains. They don't prevent XSS attacks, for example.

If there's a better name for this concept, please do suggest one.

✝ Embed Filtering

Allows fine-grained control over which Embedded objects are allowed, such as plugins, Font-Face, HTML Audio / Video.

You can’t perform that action at this time.
You signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window. Reload to refresh your session.
Press h to open a hovercard with more details.